Install Ring Doorbell Wired/Temperature Sensor in Pavatex Boards

Morning everyone! I unfortunately haven't found anything anywhere to solve my problem! I would like to install a Ring Doorbell Wired as well as our temperature sensor in our ETICS (3mm plaster & Pavatex boards)! I have the problem that the hole in the temperature sensor / Ring Doorbell for the screw is so small that only 3mm screws (diameter) fit, but these do not fit into the insulation anchors because the screws are too small for them (at least 4-4.5 mm screws). What solutions are there for this? Are there special smaller insulation anchors? I have only found the 50mm ones from TOX and Fischer but no smaller ones! Thank you ☺️

Hello,
there are mini device carriers from the company Kaiser. Item no. 1159-50.
But honestly. What speaks against simply putting a toothpick into the dowel?