Here+ BASE - possible to connect via modem instead of USB?

I have a Here+ RTK base. Normally it is connected via the included USB cable, but I saw that the base module also has three pins RX/TX/GND.

Is it possible to set up the communication with Mission Planner (which is normally happening via USB) so that it can instead be accomplished via a Sik radio modem?

If so,

  • Is there anything I should pay particular attention to, any settings that need to be changed?
  • How should it be powered?
  • What are the recommended connection parameters, particularly baud rate?

I figured I’d rather ask before breaking anything or before going down a rabbit trail.

Thank you in advance for your insights!

Dear @proficnc - could you maybe pitch in some info here?