KargoMaster Accessory- Kargo Master service body racks are designed to mount on the outside edge of the rear panel of your service body (see Rear Panel Mount photo and Service Body Dimensions below). On some service body models, the back panel is plastic or there are tail lights or box locks that interfere with the Kargo Master leg mount brackets. If our standard rear leg mounts will not work on your service body, we offer special legs with attachment plates that enable one to mount the rear legs on top of the service body box (THIS ONLY WORKS WITH SIDE OPENING BOXES) or in the area below teh box lid and above the lock handle or tail light. (THERE MUST BE A SPACE AT LEAST 1 3/4" HIGH). Please order accessory 70060 (black) or 70063 (white).