My Back Panel just has a 25 mm hole through which to pass an HDMI and a USB power cable to the display.  Gets the job done but looks a little messy.  So to clean that up a bit I modeled a plug with some cable channels. This will also help to mitigate any damage to the display electronics should the cables get inadvertently yanked.

An even cooler way to go would be to add panel mounted HDMI and USB connectors and wire them to the panel electronics. I'm OK with this way foregoing the expense of that additional hardware.

When I get to the point of adding embellishments like this to a project it's time for me to wrap things up. So onward to posting build files and polishing up the documentation.