We had a large pickup camper when I was a kid and the jacks would swivel 90 degrees to horizontal when stored on the camper. Same jack setup as in the picture(not our camper), loosen one mount bolt, the jack swivels up and cranks out(extends) a little to insert into the storage loop at camper middle. I'm thinking of converting my current FWC factory jacks to the same setup. Maybe a adapter plate made with a borrowed swivel mechanism from a H.D boat trailer jack that mounts between the jack and mounting bracket. Any ideas out there?
http://www.thediyworld.com/blog/wp-content/uploads/2011/10/1975-Coachmen-Truck-Camper.jpg
http://www.thediyworld.com/blog/wp-content/uploads/2011/10/1975-Coachmen-Truck-Camper.jpg