Simple cable retainer with 4.4mm and 5.2mm channels. Hole is sized for 3/8" screw/bolt.
“cable lock small.stl” hole is for ¼" screw/bolt
Goes great with my thumbscrews.
https://www.printables.com/model/677478-38-16-x-12-and-14-20-x12-thumbscrews
The author marked this model as their own original creation.