I know each of the 4 hubs on tandem has a 'positive' and 'ground'. What is the best way to wire this without the harness being 1"thick by time it is up to front of tounge? Seems that by runing across so all come up together into a 2-wire would me alot of junctions and connections farther back? guess a rust inhibitent junction box could be mounted back by axle area?..suggestions or drawings greatly appreciated. I'll be doing this once I get frame painted.