Display Box adapter

I hacked this adapter to connect two designs together see my Make within
BTT SKR V1.4 TURBO BOX make. https://www.thingiverse.com/make:794795

I made this a year ago and it has worked out well.

Use screws to connect the pieces together. I apologies that I don't recall the screw sizes.

The trick is to Identify where exactly to drill the holes in the holes in the controller box to attach this adapter. I only used two of the 4 holes, used the pair about halve way up side.
the holes may not be perfectly symmetrical, I have a lot to learn about designing parts.