Shelly 1L wiring with a simple double switch and only 1 line input

Please help to wire Shelly 1L with the following switch that has 1 line input & 2 outputs (means 2 different consuming lamps, each 20W+, so no Bypass).

On the photos attaches I show the current connection without Shelly - Line comes in brown wire, Consumer1 is yellow, Consumer2 is blue. Simple line breaker switch. I need to install Shelly 1L without "N" and without Bypass. Please advise HOWTO.

Thanks!