Pioneer AVM-p8000r

I bought a used pioneer indash unit and came with no instructions and the kid I bought it off of does not know how to hook it up? The brain to it has its own wiring harness and above the harness's location there is two wires labeled power supply both are black, does any one know what these are for?

go to www.pioneerelectronics.com they have the downloadable owners manual. you have register to the website first. hope this helps.