I created this mount to stick a raspberry pi running OctoPi to the top of my Ender 3 Pro. It connects to the 2020 rail with two M3 bolts and t-nuts.
Here's the 5" screen I'm using. https://www.amazon.com/gp/product/B07S82CN57/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
The author hasn't provided the model origin yet.