This design is very specific to this project:
https://github.com/mebs/CM4-NAS

You probably came from there but if not, go take a look :)
You can also take this design and modify it to fit your needs and devices, I included the Fusion360 project file for you to work on. Excuse the messy timeline!

If you take this project as is, you will need to carry over the ethernet connection with something like this: https://ae01.alicdn.com/kf/HTB1A5G4ogMPMeJjy1Xcq6xpppXaC/28cm-RJ45-Male-to-Female-M-F-CAT5E-LAN-Ethernet-Adapter-Network-Cable.jpg

For the female side to fit in the position, you will have to remove all surrounding rubber and glue it in place.

Power is expected through a standard screw-in barrel plug.

The screen cutout was made to accommodate a 128x32 OLED screen like this one: http://rassoft.net/rassoftshop/1496-large_default/091-inch-12832-white-and-blue-color-128x32-oled-lcd-led-display-module-091-iic-communicate.jpg

For the lid to close properly, you will also need SATA right angle adapters like these: https://images-na.ssl-images-amazon.com/images/I/619NHTjkwuL._AC_SY450_.jpg

More images and discussion in this Reddit post:
https://www.reddit.com/r/raspberry_pi/comments/mkbxss/cm4_custom_nas_complete/