I am in the process of upgrading the audio on my 12 and ran into some issues. I changed out all the speakers for polks and I have a sony xplod amp ready to be installed. That is where I am stuck. I cant find the stock amp, I read it is under the rear fender but after a long search I still can't locate it. I also can't find the output wires running from the amp to the speakers. I assume there are no RCA outputs on the factory amp, so my next idea was to run the speaker wires from the factory amp to the sony amp then to the speakers. I checked every wire under the seat and couldn't find the speaker wires that run to the front speakers. Is there an easier way to wire the aftermarket amp to the factory sound? Any help is appreciated.