Tow other ways is to get two telescopic magnets from a tool shop place one on the hitch head and one on the tow ball then line them up when the tow ball moves the one off the head the ball is there. Or to have a small piece of 1 inch square dowel about three foot long place this on the ground and lean it against the very edge of the hitch when the ball moves it over then the ball is in line with the hitch.