I also wonder how you wire Shelly 1L with 2 gang switch, I can't find any wiring scheme for this.
I have a 2 gang switch that controls two lights. The 2 gang switch has only 1 live in and 2 output wires going to each light. I only want to control one of the lights with Shelly 1L. Problem is, if I connect the switch to Shelly 1L, it will connect the live coming in to the switch to Shelly 1L. So to whitch terminal do I connect and can it cause any issue if Shelly 1L gets live both on L and on S?? from the switch?