I am building a rear seat delete for my 2001 mustang gt. I would like to mount the rear speakers into the back of the delete. Question: I am not going to use the speakers already in the sides. Too much of a pain. What speaker(s) should I use that are comparable with the ones already installed??? 2nd question: which wires to entend to reach behind delete? Are the wires the ones in the two recessed pockets mounted into the rear casing behind the side panels? Any help???