About 2" aft of the hitch coupling there is a hole through the frame of the tongue with two plastic plugs; one on each side. I installed a stainless steel eyebolt through that hole. I carry a 9' long very heavy duty motorcycle lock cable that I got at Cycle Gear. The eye of the bolt is big enough to pass that cable through. The 9' cable is long enough to go around a light pole, tree, or anything else available where you park. I also have a trailer hitch lock that locks the hitch coupling closed. If you go with the eyebolt, after you secure it, if you take a hammer and give the protruding threads a good whack, it will be very hard for someone with the right wrench to simply unbolt it! Of course, nothing will stop a determined thief with a good pair of bolt cutters.