How to mount a doorbell nameplate or doorbell button on a clinker wall?

Now somehow you have to prevent the rainwater from running behind the panel. So either silicone the edges of the panel slightly, press them down and screw them tight, or just screw them tight and then silicone the edges. Then you can see the silicone, of course. As a makeshift solution, you can also put a lump on the clamps... but that would really be botched work... With a carpet knife with break-off blades, you can later cut the silicone if you need to get back to it. Just generally use silicone sparingly.