H boat mast installation , parts

just got some Hboat from 80s in auction. Im wondering how to set up mast , is there some bracket or something missing to connect mast to the boat. Please see pics below !

Bracket on boat:

Mast end:


Mast end :

I’m not familiar with the H-Boat but my guess is the first image is a bracket to attach blocks for lines like halyards that feed to that area. Really just a guess though.
My suggestion is to contact someone at the H-Boat Class Association. They should be able to help you.