MASO Car Reversing Camera 120° Wide Angle HD Backup Camera 12LED Night Vision Reverse Camera Side View CCD Camera 4 Pin with 10m Cable for RV Truck Trailer Bus Camper Motorhome

It does not come with any fitting or wiring instructions. I'm an electrical engineer with 30 Years experience working on cars, helicopters and fast jets and its luck dip time regarding which wire goes where.