Hey, so, my car has the precuts in the body for 6x9 behind the back seats, however, there is not stock wiring going to them, and I have a extra set of 6x9 laying around, and I have looked for a while on how to hook them up, however, I can't seem to find a answer. :-\

Do I splice them in with the other speakers? Those are 6x8 in the doors, or ?