I think the spring loaded clamps we use on booster cables and on welding ground connecters is also very suspect. In the old days welders used clamps that were an actual clamp with a screw. Jody, the welder guy on YouTube he puts a piece of copper steel wool underneath the clamp to improve the connection. My MiG welder improved performance significantly when I replaced the cheap spring loaded ground clamp that came with the welder with a much better one. And it’s even better when I put a threaded clamp on top of the spring clamp.