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One thought I had on this was to look for a wire that already has a terminal on it. You might need to buy something more complex and just cut off that piece. For example, I've seen some battery cables that had a small (eg, 12 gauge) wire with terminal already spliced into the cable. You could cut that section off and splice it onto the end of you broken wire and avoid dealing with crimping.The gauge size is what I am debating between 12-10 AWG and 22-18 AWG and is it okay to replace with a larger size than the broken connector? Would it be fine to buy a similar size gauge wire ( gauge equal to the terminal connector) to crimp in case the length is too short. The length was another factor I was doubting and your pic on where the wire leads to helps a lot.
If you try to put a 22-18 gauge terminal on that wire, it may be too small. That wire is more like 12 gauge from what I can see.
My usual advice on this is to solder all connections, including the crimps. That's a sure way to avoid corrosion later affecting the crimp, or the crimp coming undone.
If you cannot solder, maybe you have a friend who can do it in exchange for a 12-pack of his/her favorite beverage.
Doug
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