Just did part one of the Wolfbox install. Bugger to get that wiring through the rubber grommets, etc. All good...however.... i forgot to hook up the red reversing light wire (or at least extend). Can you tell me 1) Is this actually needed given the camera is on all the time? or does it actually power the camera like other back up cams? Additionally, if it does have to be connected, is there a chance to get the power off the rear back up cam already installed (lower door)?