These are resin-printable housings for magnetic pogo pin connectors. Included are high current two pin barrel connectors and two designs for 6 pin connectors. I may add a low current 2 pin connector in the future. I doubt that any of these exept possibly the barrel connector can be successfully printed by fdm.
It would take too long to explain why, but I soldered molex pin headers to the magnetic connectors so I could use female molex headers to attach to the mag connectors.
The housings have room for this but you can connect however you like.

The original 6-pin housing was also an experiment to see if I could have a protective housing with an outer flexible shell to hold it together and provide a good grip, as well as provide a way to add strain relief in the future. I was frankly surprised how well this worked and I recommend it. However, flexible resin is not easy to print and is expensive.(although fexible-X is fairly easy to print but very expensive). The high current 2 conductor is designed for flexible resin only.

In case someone actually finds this useful(!) but can't go the flexible route, I added a design that is assembled with screws. It uses 2 3m x 8mm screws and nuts.