My friend left for the summer so he is letting me borrow his amp, sub, and wires. I was wondering. Which speaker wire would I have to tap into to get sound. Which is pos neg? I was looking at the wires leading into the factory sub and i cant figure it out. Does anyone know?

Thanks.

Also, is there an adapter where i can just plug it in to the factory harness and split it to rca?

Rosh