CN_WIR port?

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Hi, I’ve opened up my daikin ac (model FTN15PV1L)

According to the diagram, the daikin wifi dongle like the AWM61A01 needs to be connected to the CN_WIR port. Is it the same as S21 port?

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Did some more digging and apparently it could correspond to S21?

https://www.reddit.com/r/Esphome/s/Kbrt76bI27

Judging from the color cables of the AWM61A1 controller (only 4 cables)