Hoping someone can help me out here

I am using tbs tango and crossfire TX rx. Really an amazing combination. But it has a feature that allows you to transmit telemetry data from the flight controller to the transmitter THROUGH the receiver. And then the transmitter can Bluetooth it to your phone or tablet for application use. So the question… Can anyone tell me what I need (connection wise) to go from the pixhawk to the crossfire receiver? I know it’s possible, they advertise it. But I can’t find anything that says “here’s what you need” I thank you in advance!