I made a drawing of how I made the top pin pivot. Will get photos of it when I get in the garage and take it out of the deck lid next time. Used 1" x 1/8" steel plate to mount unit to deck lid. welded two 5/16" nuts vertical to this for the axle to swing in. the axle is a metric 8M nut with 5/16" round stock welded to each side to form the axle. Top pin screws into this metric nut and swivels perfectly for trunk to close and latch.