Louis Haney

Install a normally closed contact relay in series with the ground and light leads connected together. Connect the relay coil to the backup light switched lead. While driving forward ground is connected to three bypass lights. While in reverse backup light circuit is activated thereby activating NC relay which opens ground to the three bypass lights, WALAA, disconnecting cameras and the system no longer thinks there is a trailer back there. uxcell JD-1914 5 Pin DC 12V 40A on Amazon

Add a normally closed relay in series with ground and controlled by a lead from backup light.