How to put a hi hat drop clutch together?

I recently purchased a DW M505 hi hat drop clutch but when I went to assemble it there were no instructions. It's not very hard to put it together but a pin of some sort came with it and i cant find out if it goes with it or not.How to put a hi hat drop clutch together?i think so but im not familiar with dw, but most drop clutches are some what the same. it kind of looks like the gibraltar clutch.How to put a hi hat drop clutch together?I have no idea what you are talking about!