Just after Cascade, with Spades Slick killing Snowman, how did he become a cyborg? Was it like Frieza after being vaporized by Goku during Namek's destruction and was then found by King Cold and rebuilt him the manner of The Six Million Dollar Man? If so, how?

Hussie did it! It’s shown in early Act 6 Intermissions that Hussie was nursing Slick back to health.