Riviera Slave CD Player Wiring Question.

Hi everybody. I just got a slave CD player out of a 1992 Buick Riviera. I'm trying to adapt it to work in the place of the slave tape player in my '89 GMC Sierra. In order for it to work though I need to know what the wires from the white plug do. Does anybody know what each one does or know where I can find out? Thanks in advance!

maybe the shop repair manual for those year riv's? i dont know if there is a haynes for it. and you can find most repair books in the refference section of libraries.

There is a Haynes manual for it, but it doesn't show the radio wiring unfortunately.