GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
Usually it would be located upper right (starboard) on the transom just below the rubrail. 1972 was the first year for HIN's, so if you can't find one, the boat may be older than 1972. Got any paperwork with the boat?