In a smart switch such as Sonoff ZBMINI, do I need to connect both S1 and S2? I've seen tutorials only connecting S2 (on Aqara). - eviltoast

Essentially the title.

If only S2 (previous connection point from light switch to bulb) is truly required, then, wow, that makes things way easier to install.

I guess electrically it makes sense, I’m just weirded out it does not show in the instructions.