Do you want to install one of the exterior cameras or the 4th camera on the back of your trailer or 50-90 feet from the MDVR?
You can add this retractable 8 ft 4 Pin Cable for MDVR.
Retracts up to 30 ft
4 PIN Heavy Duty cable.
1080P Heavy Duty Bracket Cam with 18 IR Lights & 30' Cable
1080P Aerodynamic Side View Mount Cam with IR lights & 30' Cable
1080P Cam with BAR/Handle Bar Bracket
Mini 1080P MDVR Camera with IR lights