ok so i have a cheap head unit with the rca preamp outputs with a mach460 97'. i have the black square with the 4 rca plugs and the gray connector with 8 wires. but there are extra wires coming from theh/u idk what they are im not with it right now. i think there are 8 more loose wires on it. there are also 2 free harnesses that are stock on the car but i dont konw what they go to. well one more ithink. can someone help me out wiring up my head unit.