Safety switch on other ports

I have a hexa drone with GPS but the GPS does not include a safety switch.
So, I want to add safety switch to my drone which has Orange cube autopilot. but I did not find any safety switch port.
So, Is it possible to configure safety switch on sbus or can or other ports? if not what other ports can I use ?
also can I assign one channel from my remote as a safety switch?

IIRC GPS1 port has integrated serial, I2C and safety switch you just need to connect correct pins to the connector to get safety switch working. Please refer to cube carrier documentation for pinout.

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