My latest 50 3600 had what was left of the sliding tire carrier still attached underneath. The channel. To that a previous owner had welded a steel flat bar about 3/8" x 3" with a bend or curve to it to make a trailer hitch. It stuck out from the bumper about 3" and had a hole bored thru it for a ball. There was a short vertical bar welded to the long bar behind and bolted to the bumper. I pulled a boat trailer with it once.
