I hooked you amp up through head unit. The small grey wire is the remote wire. The connector next to it is for the back speakers. Make sure you connect your av cables also. It works perfect. I have 2 ponder 12 inch with a kicker 600 watt amp.
they my say universal but I compared them to some jdms and there the same. This company just has them marked as universal. When I get back home I'll take a picture of them on the car.