Is that the same connector as the coolant temperature sensor?
If anything, I would buy a matching set of connectors and solder them to the existing wires. I had my coolant temp connector making intermittent connection and it was not cool(pun), I would not want my fuel sending unit having ussues.
JonStevens recommends cutting the old plug ends off and buying a matching set of connectors. I agree.
I recommend Deutsch connectors (Google Deutsch.)
They're waterproof and I've never had an issue with them. They're available online or at a Harley Davidson dealer.
H-D might be using Molex connectors now. I haven't ever used them though.
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