This Bench Top Battery Holder is designed to be multi-purpose. It can hold AA size or AAA with adapter. You have the option of jacks from one cell to four. Alligator clips can connect directly to the contact studs.
I included the fusion file. You can adapt it however you like.
I use it mostly for testing batteries and for charging NiMh. It can also be used as a 1.5, 3.0, 4.5, 6.0Vdc power supply.
The base prints without support. The hardware is #6-32.
The author hasn't provided the model origin yet.