The latch striker is the only thing left to do. With the tailgate in the proper closed position, make a mark on the bed just at the top of the opening of the latch area on the adapter panel as shown. The latch striker will be positioned 3/8-inch lower from this mark. It will need to be 3/8 inch from the back edge of the bedside. Center punch this mark and drill a 3/8-inch diameter hole. Bolt the strikers to the bedsides with the supplied 5/16-18x1/2-inch button-head screws.