Just buy a camara an put it in rear connector an mount on license plate with a holder sold on amazon
The camera will function that way but the view will be from over 2 feet lower. I like having the camper camera in the same location as the tailgate camera so the view, angle, and the superimposed lines all indicate the same angles and distances in either configuration. That’s also why my neighbor asked me to make an enclosure. He wasn’t happy with the license plate location.