Sending a heartbeat from the companion computer

Dear all,

I am developing a Companion Computer software using mavlink_c_libraries.
The computer is connected to the telem2 port of the ardupilot.

I am trying to send a heartbeat from the companion computer and receive it in the ground control station. I would like to know

  1. What system id and component id I should choose to send heartbeats from my companion computer?

  2. Should I automatically get those heartbeat messages in the GCS? Will the autopilot forward them?

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