[Zeke]

If you have crimps that's what I'd do. I do soldering on old radios and it's a bit fussy, but if you're set up for it then that's good too. Shaun's advice on SR is good. Some is water proof.

I use electronic grade rosin core so no flux needed on a fresh wire like those. Do an inline twist if you can. Otherwise a pigtail folded over and wrapped works fine.

BTW, if you have any Cat 5 connectors laying around, they have eight wires too.