I have an aftermarket HU (in my sig), and yeah, I screwed it into the panel with the license plate lights, ran the wires to the HU and simply plugged it in and turned on the backup camera setting on my HU.
The only thing that doesn't work totally is the red, yellow, and green lines that show distance. They still show distance, but they're not like 1 foot, 5 feet, and ten feet. It's more like 7, 4, and my bumper lol, but that's prolly just the angle I prefer the camera at.