Anyone have the wiring diagram for the Rear view mirror?

As the title states... does anyone have the wiring diagram for the rear view mirror for a 2006 Cadillac DTS? I'm actually putting this mirror in a different car and would like to use the digital compass on the mirror but i'm unsure which wires to use. I'm not planning on using the onstar or anything just the compass. If anyone could help me out that would be great.
Thank you!