Water has always taken the least path...
Three things come to mind:
Hand Rail,
staysail traveler track ( on my 84 the nuts were exposed or covered with wood panel so easy to check. )
Mast collar.
Also memory serves me the forward dorad box is just right there also but does not have a through bolted mount.
Right before selling ours we started getting a leak in the Vberth aft port bulkhead. I was totally perplexed.
I pulled and re beded all the staysail track bolts. Solved the issue. I was honestly surprised how loose many of the bolts were.
Larry
Boatless
Larry