I bought my 99 Tahoe with an aftermarket pioneer stereo already in it and it's 10 different levels of being messed up. Only the front speakers are working properly. I assume the rears just weren't hooked up at all maybe. Anyhow, I have since installed a 10 disc changer and everything works fine except I can't find where those speakers lead to. I would just like to splice them into either the front or back speakers for sound out of them, but I can't find where they go. If I have to re-wire them, how should I go about it? I know people re-wire stuff all the time, I've just never done it. I want a good sounding system.