Anyone knw where the power and ground are connected in the 2012 with multiple amps from the factory . When I trace t I loose it in the loom. I assume there is a run over to the dash switch , but not sure.

There is a positive power bar on the amp rack and labeled for the amps and dash board.also a singe ground pole next to it. Only connection to the batteries are the switch and the pro mariner charger wires.

Trying to isolate a little noise in the system.