Sounds like somebody grabbed the wrong screws (too long) at the factory.
I think that the hole is to provide drainage for any random liquid that gets into the battery well. Spill a cup of coffee? Leave the compartment door open in the rain? Get a little sloppy with the water jug as you are watering up the battery? Gotta drain that liquid out, or it will sit there and soak into the foam and eventually corrode the aluminum skin.
You're right, Wayne, the battery box should contain any spilled acid.
Bill
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