This is a super quick-and-dirty model for a connector for C&C cage panels, such as:
For ease of printing, this model only has the ability to connect in two vertical axes (no horizontal cutouts) - these won't let you build a cage floor. The large flat side of the connector instead features large vertical cutouts to reduce filament usage.
The design is a bit ugly, and the dimensions aren't perfect, but they are close enough to be compatible with the ones I received with my cage panels.
The author marked this model as their own original creation.