Stop in for a cup of coffee

I'm leaning toward weld a nut inside or similar.

it might make more sense in the short run to use the rusty pan.
I wish he had brazed a patch on it rather than just filled the hole.

Waddya all think?
Exterior
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Interior
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I put a drain plug in a auto trans pan. Welded a nut on the inside and drilled a hole through it. Worked great. I would braze it if I had the torch.