I have right now a Z120 with the pioneer camera going to the back of the truck. But I just bought a tailgate with a OEM camera already installed in it. The wires it has is VIDEO + - POWER and Shield and a Ground. I cut the wire coming to the pioneer camera and found a yellow and red wire. Can i just attach the yellow and red wires to the VIDEO +- on the OEM camera and expect everything to work, or is there something I'm missing