Required parts: - 1 pc 1/4 UNC nut - 1 pc 1/4 1.5" UNC socket cap bolt Assembly: - put the nut to the top of the plug - screw in the bolt from the bottom, tighten it slightly - remove the last piece of the mount - push the assembled plug from the wider opening of the joint piece - the verge will keep it in place - fix the plug by screwing the cap on the plug - push the last joint back