I struggled with how to mount these- 2 on each corner, with one north south and one east west? Or one on each corner pointing around the camper. I settled on one on each corner- right rear north-south, right front east-west, left front north south, and left rear east west. They sell them as a pair so you can lock out motion in both directions. Could you figure a way to have one on a north south plane and one on an east west plane? East west on the rear and north south on the front?