Jon Boat Live Well Help

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Hey all. This is my first jon boat and I’m confused about this live well. I have a drain plug in but there is a small hole that circumvents it. How is this intended to work? I thought I’d be able to plug it completely.

Also, when I put water into the livewell I get water into the main boat cavity, I’m guessing through one of the welded seams. What’s the best way to diagnose and repair that?

Any help or suggestion is welcome including a low cost full solution to include a bubbler for bait or keeping fish.

Thanks.

 

[oxygencube]

This post finally got approved as I’m new. Bumping to see if I can get some help. Thanks.