I'm installing a new receiver, and I have a question about the wiring harness. The part that came with the receiver has a long black cable that has a c-shaped connector at the end, for grounding the unit. But the wiring harness for my vehicle has
a black wire, same gauge. Should I connect the unit's ground wire to the metal of the frame, or lop off the connector and attach it to the harness?
There are also a few wires on the harness that I'm not using - orange, blue, and blue/white. I don't want to leave them exposed, but the wires are already stripped. Any advice on what to use to cover them up?