This is a clamp for the Olympia XL Cart that allows you to attach a ¼"-20 nut or bolt to the front of the frame.
The side nut slot and chamfer were designed to use an M5 20mm bolt and nut.
The front-facing piece can hold a ¼"-20 nut or bolt. This is a standard accessory mount size.
I printed them using a .2 Layer with 10% Infill. Supports are recommended and are easy to snap off.
The author hasn't provided the model origin yet.