Wiring for factory amplifier
 

I installed an aftermarket Stereo (Head Unit) in my 2007 Saturn Aura. The install guide calls for me to hook up the head unit to the factory amplifier. I have a couple questions; 1:) Can somebody point me to the location of the factory amplifier. 2:) Can somebody give me the wiring details for the factory amplifier so I can hook this up to my new head unit. Thanks....a lot.