I'm still having trouble understanding the connection for the centerboard controls on my 1976 DS II.How is this block system attached to the top of the cuddy as I have seen pictured? My setup looks similar to the lower half of the diagram and photo, but I seem to be missing something from the upper portion of the picture. I can't see anything on my boat that was ever there to attach anything to. Is this a standard CB setup for the DS II or is it an add on?Thanks again for the help.