Shelly Dimmer 2 with two-way switches

I just installed a Shelly Dimmer 2 using the attached connection scheme, but the physical switches need to be kept untouched. Otherwise the dimmer can't operate.

Did I connect it wrong?

Is it possible to have the physical switches turn the lights on/off, while the dimmer only controls the dimming level?

Of course. Sorry for the previous image.

Thank you!

I only know the switches have a wire connected to the L pole. I also think one of them is the live wire, and the other one goes to the 3 lamps, but can't tell you which is which.

I can send photographs of the "before" setup, if you wish.

In other words, I'd like the Shelly dimmer to act as a cross switch, linked to the other two, while also dimming from the app. Is that possible?