Hey there, i have a 2013 nox ltz with the touch sceen head unit.. i am trying to install an aftermarket amp and subwoofer.. i have ran all the other wires other then the rcas to the back of the head unit. I have an adapter that changes the rcas to regular speaker wires.. what i cant figure out is which of the wires are the front or the rear speaker wires? I have looked all over the internet for the answer and no luck.. what i need is the color of the wire and what pin number the wire is in.. any help would be great!!!