This is the solution for mounting a joystick. The hole should be 100 mm x 60 mm and 6 mm depth.
Per-joystick you also need 2 PC fan screws:
https://s.click.aliexpress.com/e/\_d7h8w6k
The DIY Joystick Arcade Kit used for this project was:
https://s.click.aliexpress.com/e/\_dSve7sG
The author marked this model as their own original creation. Imported from Thingiverse.