Tow more than one trailer. Take advantage of your existing four-flat when adapting. The 47175 attaches to an existing four-flat to bring the lighting functions to the six-pole round connector, leaving electric brakes, auxiliary power and ground as the only functions that need to be wired. The Multi-Tow? design feature adds multiple towing options from one connector by providing sockets for towing both six- pole round and four-flat trailers.