However, on my dimmers it doesn't look like a hole. but do I just need to push that little u shape of plastic? And does it need to be powered on when reseting? I assume so!
Both dimmers don't create their own AP with their shellydimmer2-* name when I'm reseting them: place a pulse switch between L and SW1, and within 60 seconds pressing the pulse switch 5 times. The light connected to O is on.