switch case addon for lcd full graphic

i've recently make a Case for LCD Screen Full Graphic 128x64 multiple stand from Asphyth (https://www.thingiverse.com/thing:2470605) and i think it is a great case but i needed a way to put my printer switch so i've designed a simple part that is screwed with the rear part of the lcd case .
the hole for the switch is 20mm diameter .