Simple slide-on wall mount for Waveshare 4.3" 800x480px IPS DSI display.

I have printed it with PETG and 0.2mm layers and tree supports with 20 degrees angle. Depending on how well your printer is tuned (or rather not), you may need to file the holes and the columns on the wall mount just a little bit so the case fits better on/in them. Try the mechanism before you mount it.

You print the case and put the display in under an angle and put the long side of the PCD under the tabs on the case (can be seen on one of the images). Then you carefully put the display in the case while helping it a bit by bending the case just a little bit on the sides. The tabs should hold it in when you do it right.

The wall mount (after you have touched it up if it needed to do so) can be screwed in the wall anchors or into the wood or whatever you want with it. Then you connect the display, tuck he cable in the hole and you slide the case on top of the wall mount. You may have to bend the cable a bit on the connector side so it doesn't protrude so much. Don't do this while it's connected otherwise you may tear off the connector.