Drilled and tapped lugs as necessary. The threaded lugs are 1/2"-20, which will be slid into the opposite end of the tube and welded… this is where the adjustable ends will thread in. The tubes were coped to accept the .500” steel rods, which will also be welded in place. The small bushings will be inserted into the mounting holes of the adjustable ends as they are larger than the mounting hardware being used.