The red connector looks like the accessory sub harness connector. The accessory sub harness can be purchased to hook up a led light bar, winch, horn, etc. Not sure on the other connector but I will look on my P500 tonight when I get home and see if I can figure it out. BTW, it appears you have a horn that was connected by some other means than the accessory harness, not necessarily bad, but I would check to see what circuit it is spliced into and verify it is fused to a non-critical circuit.