Merry Fisher 805 Bilge Drain Holes

[william51]

I would be grateful if someone can clarify the following re bilge drain holes on Merry Fisher 805.    Adjacent to the rear engine mountings are two X approx 2" holes on each inner side of the bilge.   I was to believe that they assisted in bilge water drains but have noticed that all four have been capped with plastic type grommets.   I would like to know if these holes should be blanked off or left open?  Thanks.