I have some tools from Ancor Wire, and FTZ. They have excellent connectors as well as tinned AWG wire.
Double crimp connectors, Cool-Seal anaerobic crimps, etc. some are even s/s, and made for marine environment.
Been using them for years. I use fine stranded pre-tinned wire, and tinned connectors. Combined with shrink tubing, it is a very durable connection.
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