I modelled a "bridge" with a platform to mount the display electronics.

It bolts to existing tabs on the display frame. I attached an HDMI cable from the Pi 5 that I have with a fresh PiDP-1 image. I'm powering the display from one of the PI's USB ports. So far so good. Flicked the power switch and nothing happened. Figured out that the ribbon cable between the display and the electronics was reversed so I fixed that and voila. Well actually the screen was upside-down so I had to update the Pi's Windows Config, but then I saw the image shown below.

So far I'm happy with the way the screen looks. Since I just installed the PiDP-1 image I have not yet had time to figure out how to run a "full screen" demo. Stay tuned.