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Installing a sonoff device on a heat pump connector?

I have a weishaupt heat pump, which controlls a circulation pump for our heating system with a connector cable (picture enclosed). since this is the only connector for a circulation pump, it obviously supplies power as well as some command controls.

I want to be able to turn off circulation pump remotely (without turning off the entire heat pump).

To do this, I would install a Sonoff T1 wall switch, but the thing is I would have to install it on this connector cable. Is this possible, since it is not a normal AC power cable?

I tought it could be possible by identifying relevant wires inside this cable. Does anyone have any experiences or knowledge about this?

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