I bought some solder-type USB A-plugs to go from my Limefuel battery packs to my (tinned copper braid grounding strap) power bus. But there’s no way I can solder 1.5mm^2 (16 AWG or so) wire to the plugs. I don’t even think they’ll fit in the plug housings without touching the shielding. That thickness of wire is impossible to tin, too.
These wires need to carry a bit over 2A each, and will be maybe a foot long. Am I way over-spec-ing this? What would you use?