Good luck there buddy.
I have been looking for information on this for a couple of weeks. I am thinking it does not work at all.
I have the Dragonlink Transmitter bluetooth to MP.
Now for the antenna you need an arduino. Maybe a basic 2.6 board would be the way to go. It will connect to MP via USB and interface with the servos or Maestro
The Dragonlink has nothing to do with the tracker but you do need the Dragonlink receiver sending telemetry data from your autopilot to MP. Also your MP computer needs GPS.
its work with apm check this: