Pixhawk 2.4.8 setup with Corssfire Nano

Hi there guys. I have a Pixhawk 2.4.8 on my F450 flamewheel and I have always used Flysky on this one while using Frsky on my racing drone. I brought myself a TBS Crossfire Micro and managed to set up my racing drone to work on crossfire perfectly. I however am not sure how to set up my pixhawk to now use crossfire. Are there any tutorials or instructions on the wiring and setup that I can use please? I have a Pixhawk 2.4.8, crossfire Micro TX and a crossfire nano rx. Thanks in advance for any responses, I highly appreciate it. Kind Regards. Wimpie.