Alan,

It should be the same as the H-16. There is a U shaped piece of stainless which fastens to the tang on the crossbar mast support with a pin. There are two sets of holes on that S/S piece, one marked 14 and one marked 16 for the respective boat. That should pin to a tang on the mast base to make a hinge joint. After raising the mast and fastening the forestay, you pull the upper pin but the lower is usually captive with a split ring and the hinge piece stays on the boat. Repin to the mast to lower it.

Howard