I was wondering where the best place to get the audio signal from to feed to an aftermarket amp would be. I had the stock sub...should I use the speaker wire that is in the harnes? (If so, anyone know what is what in the harness?) Or do I have to take out the deck...and if so, do I need to splice the speaker wire to the amp into one of the wires coming out of the back of the deck? Front or rear?