Make sure you fully understand how to set up uninterruptible power before connecting the device. Uninterruptible power cable can be installed using wires from the fuse box inside the car. Each wire must be fixed to a specific dedicated location, otherwise inverse voltage can happen, seriously damaging the device. Black wire (GND) : Fix it to a bolt attached to the metal of the vehicle's body. Red wire (BATT+) : Connect it to the uninterruptible power fuse of the vehicle's fuse box (hazard flasher, dome light, taillight, etc.)