Update 10.08.2023:
Updated version with tooth which are more stable than the original one.
Have you ever had the issue that the thermostat adapter was broken? Yes, it happens quite often.
Therefore I created a model which can be used to be mounted with screws to the thermostat.
How to install?
Remove the parts of the thermostat which are marked in red in the picture. You also need to remove the battery connector (silver) and remove the parts which look up or down, just keep the flat connector. Glue that part to the adapter at the proper position. The green marked hole in the picture is one of the holes which is used for the screws.
The author marked this model as their own original creation.