Weld-On Cable Only Winches are designed for use with wire rope and/or cable as the binder when securing a load to a vehicle. The standard winch no.’s 7540, 7540-LH and 7540-NP are designed for under mount or bottom mount applications only. The 7545-RH and 7545-LH are designed to be mounted on the ends of trailers in a side mount, permanent position