The Dimmer2 works exactly as the Dimmer1 in regards to the wiring scheme, so please have a look at:
https://www.shelly-support.eu/index.php?attachment/12835-ar768-kreuzschaltung-png/ ← three way switch
https://www.shelly-support.eu/lexikon/index.php?entry/113-connection-diagrams-shelly-dimmer/ for more wiring diagrams.
Now I needed these diagrams, but they’re not avail anymore on above links: https://www.shelly-support.eu/index.php?article/46-shelly-dimmer/ is the new one for the Dimmers
