Dear Fellow Sailers, I am hoping someone will be able to tell me how to attach the mainsail sheet to the boom. I have rigging instructions for the O'Day 22 but that attaches at the end of the boom, not the centerboard casing like mine. I have the block with the sheet fed through it, now I need to know how to attach it. I think there may be a piece missing, I need to know what it looks like.Thanks,Edwina