MissionPlanner Com Port

I’ve spent the last 2 hours trying to figure out which COM port is acceptable when setting up my first shot at Mission Planner… Using Linux, this has been one hell of a journey getting here, and being as though I bricked my 1st viper doing all this, I am really reluctant in just pushing buttons… lol
So, in the initial startup it asks which COM port…
etc… S2
etc… S3

So, what am I missing? i had to go over to the Mission Planner Beta since it wasn’t recognizing me at all to begin with.

I am running APM Planner v2.0.23 under Ubuntu Mint on a Thinkpad.
I don’t use a COM port. I connect to the SV’s access point via wifi and then use a UDP link connection.
UDP Port is 14550.

I hope this helps…