These are simple mounts for the braided UGreen USB 3.0 Cable extensions, or…

“UGREEN 2 Pack USB Extension Cable, (XX FT+ XX FT) USB Extender USB 3.0 Extension Cable Nylon Braided Compatible with Webcam, Camera, Phone, USB hub, Mouse, Keyboard, Printer, Hard Drive, Headset” as listed on Amazon.

Print them in the obscure, angled orientation shown in the pictures.

When mounting, slide the cable into the opening.  The cable should freely move back and forth within the mount.

Secure the mount and slide the end of the extension into it in whatever orientation you want.