Automatise4life ’s wiring scheme is correct, your conclusion isn’t. Maybe following sketch is more easy to understand under your circumstances:
Do you mean because of
So the Shelly is on the box with the left switch.
?
Because that confused me at the beginning, but I think by left switch he means the one on my drawing and not his, i.e. the one inside. So I think he understood how to wire it, but just to make sure: the shelly 1 L goes in the box inside, not the one outside! So the one where there is L and not the wire to the lamp.
miso k ....... im not sure whether I can have a look at this tomorrow, maybe needs to wait until Wednesday. Had barely any sleep and a lot of work. Maybe you can explain as understandable as possible what you want to achieve and what the situation is at the moment. That picture makes my head spin and I haven’t opened a bottle of wine yet