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DELCO PACKARD 56 terminal
The only Fast-On terminal worth snot. It does not fit loose, get loose or overheat.
You'll have to crimp the closest terminal to the copper stands then the 2nd terminal to the insulation. It's a tight fit but this is an automobile manufactuer's preferred terminal because it works. The header says 12-gauge I've connected hundreds to 10 gauge.
I've not seen counterfeits of this connector. A bit pricey but worth every damned penny. I REFUSE to use snot grade fast-on terminals after getting burned by connector failure.