Put the spring & 1 cup inside with the recess to the opening. . Then put it over the ball. The ball should go in the large opening & slide back. Then put in the other cup in the hole & the screw. Tighten the screw till it bottoms out & back it off a little. Move the joint back & forth to seat it & tighten the nut again & back it off enough to line up the cotter pin hole.
