[CA] [CA11] i70s where does compass go

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I am replacing some 3 old ST50/60's with 3 - i70s'
I have an ITC-5 to convert the wind, depth speed to STg.

Currently there is a Gyroplus 2 SHS installed. I believe that also means that somewhere on the boat is a fluxgate compass. I think the SHS outputs ST which I believe I can connect through a converter to the STg network. The boat has no autopilot. One of the ST50's displayed heading so I believe that was its only use.

Initially I was doing some research to see if I should remove the SHS and connect the compass directly to the ITC-5 and then found that the compass is "discontinued".

Assuming I can continue to use what I have for the time being. Does it make more sense to connect the compass directly to the ITC-5 or take the ST output from the SHS and convert/connect to the STg network?

What is the replacement for the compass, would that be the EV-1/2 sensor core ?

Thanks