This is an adapter to connect wires to a cordless drill battery.
It's somewhat parametric, more parametricity will come later.
* replace pen springs with sprung plastic like the rod clamps in Prusa's felt branch X ends.
* Make outer dimensions calculated from inner dimensions
* Replace majority of body with tower-like feet to reduce plastic and print time
Insert 4mmx15mm pen springs into inside of holes.
Insert wires from outside through springs.
Splay copper over end of spring.
Drop onto battery, hold springs out with fingers so they hold your wire against the terminals.