Behind the switch, two way switch (EU) with Shelly 1

I want to connect Shelly 1 to multiple two way switches but I can't find the correct schema in lexicon for this wiring I have behind the switch. Any suggestions?

Here's the switch (BTicino Classia):

[Blockierte Grafik: https://lh3.googleusercontent.com/92hv6uawifyJUdTY7tO77igel2G4K-JS4caOaVfnlYF6IxrzSwhd7AyE7zaBjPCWW050eZW4w2NP3oA_UmgHZYp1nDMSGHXAuxSoQ7HWKW8MCcR5WdE-e59Ea3oQyc6Zj1xInRw5nU4vMSD7e61AGWzVWjBi3ROqPn22uqL-3ZyUByjecankEnsMFFxTC7Ycn7MoQm16F9zjxV0xy67Jii17dW7sX2vPV1tVFT2LLbtklZ4qSESgzSNzCnDf66BXyL8pA4q0AZBsY_Q6SYelc2YYoqATB6mKayEaeQcG2mJUnjjcVDXlGpTa2epFwtgblORX1-Veqv8EW7yk6GiGUMnngD9smp1Xepq2cI1iy4qw4ALRvTXAqlJttHC800ZXVuz-kA8NF_temPtPxj49QmrsXtqYotedo8ZwFp5iJVsdbYq_YD9ETzSds-xOWxJSMG15BapKXD4McPxs3PwyMwbJa4Ze3rIjgINnbemn7NqW87ZPeqFNMMrpVBK_yI4bZ2nfo9HnP6HwYX-xNx3OeOjbpr6PWoPEUGabjUuPwEUc3S-ZrSzR9X3rDpnfqNPIH3IzWQRxcLnM2wQpsRGj-bNrpPm_yTI-T4P5aNZOJPMaNf5gNu01k_Rk_o2HdpgAZOO2pYd3lfLKvLNNDYOct4hblcyYf2czMsWJAhdzx_AzyvWpqkQCYfBM7cGriOGcrUQ5GrDHQgjAUulJxdNWJbjN=w706-h941-no?authuser=1]

Brown wires go to I and L, blue goes to N, that's clear. But which one goes to O and SW ? Black to O and gray to SW?

I have neutral wire (blue) in the junction box where switch, pictured above, is located.