Welcome to the forum.
Do those floor openings drain into a sump pump box?
On my 2000 380DA the shower, floor drain and air conditioner condensation pans all drain into a sump pump box, for overboard discharge when the level gets high.
Regardless of the drain configuration, water must go down and out. Do either or both drains work as intended? If not, then fixing that problem is a good first step.
