A tractor and trailer combination including a tractor having a tractor frame, a supply unit, a trailer coupling, a skid plate, and a first connector coupled to the tractor frame and coupled to the supply unit to receive at least one of high voltage electrical power and coolant from the supply unit. The present invention is useful in a wireless communication network having a reverse pilot channel. There is provided connecting assembly for connecting the forward end of the hitch arm to a hitch connector of the tractor and a mechanical connection from the PTO of the tractor to a pump for hydraulically driving the cutting assembly.