This is an adapter for combining the Shelly Wall Switches e.g.: 

https://amzn.to/3XbSPc6

https://amzn.to/4e7JSXF

https://amzn.to/458Ltsc with or without https://amzn.to/4aP6PMe

https://amzn.to/456prWQ

with the Jung CD500 System such as sockets and switches like this: https://amzn.to/3yBQFbC

You can also use this Adapter with the Jung original CD500 frames such as https://amzn.to/3wMIgSo or https://amzn.to/3RapPhk but on those ones, you need either trim some plastic noses on the shelly switch or you need to file some nicks into the original frames

The adapter part is in FDM-Printers best printing in a down position without any support.

The frames need some support from the build plate anyway in printing in the up position.

06/2024: I had to modify my frames because Shelly has updated the Switch slightly. Therefore my Switch Frame design allows me to place Jung inserts directly in my frames with their rings.  Also, I added a triple frame requested by @wassy92x .