2000 dodge durango aftermarket dvd player

Hi, i was wondering how exactly you hook up a aftermarket in dash dvd player to a 2000 dodge durango with stock infinti system. I know the basic wiring like ground, power, ignition but what about the pink brake wire, how does that wire work. I have read that sometimes you just ground that wire out(if you want to watch while driving that is). Does that work for a power acoustik dvd player? And also on the back on the stock head unit there was a single wire with a female connector on it, it is black with a brownish stripe, is this just a ground for the stock radio? If so can i just connect the black and pink wire from the dvd player to this?