IT'S SIMPLE. JUST FLIP THE HANDLE TO THE INSIDE AND SWAP THE TWO RODS THAT COME FROM EACH SIDE. THEN, WELD A PIECE OF 18 OR 20 GUAGE SHEET METAL INSIDE OF THE OUTSIDE HOLE. USE FIBERGLASS (NOT BONDO) FOR YOUR BODYWORK. WATER CAN GET INSIDE OF THE HOLE ON THE INSIDE OF THE TAILGATE AND GET INSIDE OF YOUR BODY FILLER. FIBERGLASS IS A LOT MORE WATER RESISTANT THAN REGULAR BONDO.