Align the lock bracket over the hole. Hold the locking assembly firmly in place, re-install the bolt through the two brackets and tighten the bolt. Check the operation of the locking and the unlocking step. Open tailgate, start at left or right side of tailgate end, locate latch mechanism, remove top 40mm torque bolt, install security plate by removing double stick tape, align the two holes, then re-install 40mm torque bolt. Repeat for other side.
Installation is complete.
Remove access panel on cargo side of tailgate by removing the 12 screws with a 30mm torque driver. This will reveal the backside of the tailgate handle assembly. Remove the two 10mm nuts that hold the tailgate handle to the tailgate assembly and remove factory handle. Re-install the access panel. Installation is complete.