Stereo & Electronics - Question on adding a CD Changer to a Factory Monsoon System

I recently baught a factory Pioneer CD changer for my Trans Am and according to GM my car is already prewired for this CD changer, but I am wondering where do I find these wires?:confused: If anyone could give me some direction I would really apprciate it!

If they are there, then you can find them under the rear hatch panel on the drivers side (the one that has the very rear speaker in it). I can't promise it's pre-wired on all cars, but that's where it'll be. Hope it helps.