Hey guys, I'm trying to wire up a new head unit. I ordered this off the internet: http://www.amazon.com/gp/product/B000KL ... ge_o00_s00
But when I took out the factory radio, I found two harnesses plugging into the factory radio! But my aftermarket harness can only hook up to one of them! Is the other harness unused?
The factory harnesses:
The aftermarket harness: