I designed this to connect some wires to a doorbell PCB without soldering. It slips right onto the connector on the board and accepts either 3 single male dupont wires or a (3 pin) connector which are pressed against the contacts of the PCB.
Printing with prusa slicer I got best results when printing it upright but I had to enable “Detect thin walls”. Using the new engine in Prusa slicer 5 should also work.
The author hasn't provided the model origin yet.