Armstrong 132L FG board foot strap bolts

Hi All,
Maybe a bit of a silly questions but wanted to ask to be sure.
I have just brought a 2nd hand first generation Armstrong 132L FG board in very good condition so dont want to damage doing anything silly.
I have a mast with E-Foil motor on it for days with no wind. This board is perfect as has the hand hole all the way through I can mount my ESC Battery box on the deck up the front and run the cables through the hand hold.
I only have 1 set of screws, the ones that hold the back foot position plate down. I was going to use those in the front foot strap holes to hold the box down.
If I pull those screws out do I need to seal the hole to stop water getting in?
I assume they are sealed in plugs so wont be a problem but never seen those self tapping screws in a board before.
Just would hate to get water in the foam.
Cheers