Universal AB Clip version, remixed from kekerino's project
These are the .stl files for half of a clip of either the 2S, 3S, 4S, 5S, 6S, 7S, or 8S size clips. Both halves of a full clip are the same, and they just snap together on either side of the balance lead.
In addition, there is a .f3d (Fusion 360) file where you can set any "Series" parameter value. (If you increase the "Series" parameter value, you need to manually edit the first extrusion operation to select the holes for the wires)
The author hasn't provided the model origin yet.