I will be installing a MiniDoMore hitch on my 2004 MCS. Will also want to install the necessary trailer wiring harness. Thinking about also outfitting the car to on occasion be a towed vehicle, i.e. a 'toad' with a Blue Ox base plate up front. Anyway to make one wiring harness do both jobs - connect to a trailer AND provide necessary control of the Mini's rear lights when the vehicle is being towed?