Uk wiring Shelly Dimmer 2

I live in the UK,

I am seeking to add dimming function to a one way push on push off switch that controls two wall lights with dimmamble led bulbs.

My flat has neutral wiring available but not at the light switch.

The Switch has 3 wires behind it

1 Black (Brown band) Switched Live running to L1

2 Red Live running to C

3 Green /Yellow sleeved

I assume the black wire goes to O on the Shelly and the Red to L on the Shelly.

Can someone assist with the remaining connections i.e from switch to Shelly I assume C to L on Shelly and L1 to to SW1 on Shelly

A clear diagram would assist.

Thanks in anticipation.

Thank you, I have seen this diagram before and others.

Forgive me if I dont fully understand it.

I assume L on the diagram is switched input from the only output (O) on the Shelly (and that L = C in my set up)

The input to SW on shelly in the diagram is a switched input so it appears dependant on output from shelly as a source of power

I may of course be missing something obvious but i wish the Shelly to determine if the pysical switch is on or off and provide an alternative source of power to light from one of two inputs similerly to Shelly OnePlus which has Live input I or Switched Input.

I assumed therfore the Switch would need to retain a independant Live input to do this?

The assumptions i made in my first post being incorrect in terms of C to L on Shelly but rather Connect the C terminal to Live feed with Wago?

Can anyone further elaborate please

Thanks again I am using a push button on off switch.

So clearly the diagram is for something different.

The diagram shows the rear of a German made assumedly push button momentary switch.?

There are no terminal markings shown and thus impossible to compare with my own,

I do not require functionality from the switch itself and require dimming from app only.

Sorry if above was not clear in my original post