amping the four speakers HELP!

[hollxiter16]

well i just bought a 500w sony xplod amp and i want to amp all four of the speakers. problem is i have the premium amp under the drivers seat. now i now it has like a 5v wire going to it or something. im not worried about that i was gonna rewire the hot wires anyway. but which ones are the speaker wires and my headunit that im gonna be putting in only has one preamp output and that is already gonna be occupied by subs. will i have to put in a line output box or something?

[ZX2Fast]

You can use a line-out converter since your speaker wires before and after the amp are already in the location under the seat. You might be able to find a wire listing online or in the back of a Haynes manual. If you can't find them, PM me and I'll look them up in my wire book. It would be easier to use for you if you had a visual list instead of just a text list.