This is a mount i made to hold a small LCD temp & Humidity  gauge i got of ebay to use on the enclosure i made for my Prusa MK3s+.

The gauge slides in from the front  the opening has 2 slots in the side for the tabs.

The gauge can be found on ebay.

https://www.ebay.com.au/itm/134233639537?var=433685872659