Frsky Telemetry on Pixhawk 2.1

Good day. I have a Pixhawk 2.1 FC on my F450 drone. I have switched my transmitter from Flysky to Taranis QX7 on my racing drones and now brought an R-XSR receiver to convert my F450 also to the Taranis. I am busy planning the change on the drone and need some assistance in how to get Telemetry to the QX7. I see some guys have a specific cable and some did it DIY and here in South Africa we do no have the suppliers of those type of cables. So I am wondering who can help me with instructions on how to make my own cable and how to set up the Telemetry or alternatively if I need to Import I will do so with a smile. Thanks for your help so far. Kind Regards. Wimpie

Two links to get you going