Since the screws go into wood I doubt red Loctite would work and if it did if or when the screws came out it would destroy the wood. Plan ahead, apply sealant before you tighten them.
You might also do a test tighten and see if they all hold. If not you'll either need some new Stainless Steel larger screws of you'll need to glue some toothpicks in the old holes.
Loose topcaps can happen to anybody except BassCat and one or two other boat brand owners. Some day I'll get back in a BassCat but I better hurry, I'm 76 and ain't getting any younger.