I have the exact same setup in my '65 TradeWind and I'm working on updating/replacing it. The lower 3 little boxes are auto-resetting 30Amp breakers. These are automotive devices.
I will replace these with 30Amp manual reset breakers or an auto type fuse panel so if we do have a short, it has to be reset/replaced. I prefer this over the auto-reset type.
The upper fuses are 40AMP old style glass fuses. I will replace these with manual reset breakers as well. Same type as the 30Amp used above.
Jon
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