As part of my DC power supply project, I wanted to add a couple of USB jacks that could be used for charging different devices on the bench. They are wired to a current limited 5V supply and have resistors on the data lines to allow devices to recognize the jacks as >500ma charging stations. To mount the USB jacks on the power supply faceplate, I created this 3D printed panel insert to hold the USB jacks. The design is parametric, so you can easily change the design to suit your connectors.

Update Sept 2019: Added a rectangular version that minimizes panel space. Project description can be found at: http://ve7it.cowlug.org/dc_panel.html custom knobs at: https://www.thingiverse.com/thing:3464847