Would there be any harm in just removing the bolts and filling the holes with
sealant and then replacing the bolts. There doesn't seem to be a
danger assuming the holes in the floor are sealed and the
water can't run into the
core of the floor. If it stops the leak you
solved the problem and if it doesn't you take the thing off and seal the entire binnacle. While not as likely to fix the problem it is easy to check after you do it to see if it worked.
Jim