If you need to add a panel-mount connection for USB C, but don't have the time or tools to cut a custom oval or square hole, this USB C Jack to USB C Jack Round Panel Mount Plug is the easiest and fastest way to panel-ify your project. It's about 30mm in diameter, so you can drill a hole in your wood, plastic or metal with a common hole-saw or bit, no special shapes or filing required. Un-screw the plastic nut, insert the plug and re-attach. Ta-da! Now you have a panel mount USB C jack.
On both the inner and outer side is a USB C connection, which is a pass through so it can be used for power, data, and either host or peripheral.
Please note that due to how USB C reversability is designed, this USB connector will only work in one orientation direction. If you don't get a connection, flip the cable around and try again!