No, it's not the absolute best you can do, it's what you're willing to settle with.

I'm not trying to sound cold hearted here, but you're really over-thinking the entire situation. If you don't want to solder then just use the existing banana plugs that you have. Trim the plastic off the back of them so they are bare metal, stick them into the banana jacks on your fight box, and then clip the alligator clips to them when you want to use your starter. Simple, quick, and it works. Problem solved.

Ken