Joseph was with a butler and baker, no?
Here, in Genesis 40:
1 And it came to pass after these things, that the butler of the king of Egypt and his baker offended their lord the king of Egypt. 2 And Pharaoh was wroth against his two officers, against the chief of the butlers, and against the chief of the bakers. 3 And he put them in ward in the house of the captain of the guard, into the prison, the place where Joseph was bound. 4 And the captain of the guard charged Joseph to be with them, and he ministered unto them; and they continued a season in ward.
And the connection you're asking?
Here it comes -
'Al-Ahram' Reports: Coins from Era of Biblical Joseph Found in Egypt
According to a report in the Egyptian daily Al-Ahram, by Wajih Al-Saqqar, archeologists have discovered ancient Egyptian coins bearing the name and image of the Biblical Joseph.
Following are excerpts from the article: 
"Koranic Verses Indicate Clearly That Coins Were Used in Egypt in the Time of Joseph"
"In an unprecedented find, a group of Egyptian researchers and archeologists has discovered a cache of coins from the time of the Pharaohs...Some of the coins are from the time when Joseph lived in Egypt, and bear his name and portrait.
"There used to be a misconception that trade [in Ancient Egypt] was conducted through barter, and that Egyptian wheat, for example, was traded for other goods. But surprisingly, Koranic verses indicate clearly that coins were used in Egypt in the time of Joseph.
"Research team head Dr. Sa'id Muhammad Thabet said that during his archeological research on the Prophet Joseph, he had discovered in the vaults of the [Egyptian] Antiquities Authority and of the National Museum many charms from various eras before and after the period of Joseph, including one that bore his effigy as the minister of the treasury in the Egyptian pharaoh's court…
"Dr. Sa'id Thabet added that he had examined the sarcophagi of many pharaohs in search of coins used as charms or ornaments, and that he had indeed found such ancient Egyptian coins. This [find] prompted researchers to seek and find Koranic verses that speak of coins used in ancient Egypt, [such as]: 'And they sold him [i.e. Joseph] for a low price, a number of silver coins; and they attached no value to him. [Koran 12:20].' [Also,] Qarun  says about his money: 'This has been given to me because of a certain knowledge which I have [Koran 28: 78].'"
"According to Dr. Thabet, his studies are based on publications about the Third Dynasty, one of which states that the Egyptian coin of the time was called a deben and was worth one-fourth of a gram of gold...
..."The archeological finding is also based on the fact that the inscribed face bore the name of Egypt, a date, and a value, while the engraved face bore the name and image of one of the ancient Egyptian pharaohs or gods, or else a symbol connected with these. Another telling fact is that the coins come in different sizes and are made of different materials, including ivory, precious stones, copper, silver, gold, etc."
..."One Coin... [Had] an Image of a Cow Symbolizing Pharaoh's Dream about the Seven Fat Cows and Seven Lean Cows"
"The researcher identified coins from many different periods, including coins that bore special markings identifying them as being from the era of Joseph. Among these, there was one coin that had an inscription on it, and an image of a cow symbolizing Pharaoh's dream about the seven fat cows and seven lean cows, and the seven green stalks of grain and seven dry stalks of grain. It was found that the inscriptions of this early period were usually simple, since writing was still in its early stages, and consequently there was difficulty in deciphering the writing on these coins. But the research team [managed to] translate [the writing on the coin] by comparing it to the earliest known hieroglyphic texts…
"Joseph's name appears twice on this coin, written in hieroglyphs: once the original name, Joseph, and once his Egyptian name, Saba Sabani [??? Genesis 41: 45 And Pharaoh called Joseph's name Zaphenath-paneah; and he gave him to wife Asenath the daughter of Poti-phera priest of On] , which was given to him by Pharaoh when he became treasurer. There is also an image of Joseph, who was part of the Egyptian administration at the time...
 Al-Ahram (Egypt), September 22, 2009.
 This is the Koranic name of Biblical Korah.
Now, I have my doubts about this but if the Egyptians are going with it, heck, I don't mind.