If I remember right (it has been a very long time), the leaves had something similar to the smaller tables at the end of the setees. A metal bar that folds up. The table is now living happily in St. Louis, so I can't check.
BTW, one word of warning. The vertical posts supporting the table seem to become stuck, most especially in salt water. Both of the boats on the east coast that I borrowed for regattas had them essentially welded in place. I guess i would remove the table when not in use.