I installed two backup cameras with Parking Sensors Amazon.ca price $40 each, one in front under the high point of the front valance and the other above the Rear licence plate run the Front wires along side the passenger Wiring harness. For the rear one I run the wires in the transmission/ drive shaft hump. I am planning to install side view cameras in the futur.All the cameras video output connect to a small 12 volts DC 4ch color video Quad splitter MulTiplexer processor switcher for CCTV security Cameras with a remote control and reverse option off reverse images. Amazon.ca $68.99 CDN. I mounted the Quad in my glove compartment! Small footprint and connect the output to my 7" GPS / Video unit. You Can do the same by plugging the Quad video output to your new head unit and view all the cameras on. The split screen or view the cameras you want on the 1-2-4 screen options. Take your time when you run your wires,solder and shrink wrap all connections if you can.