Did you look here?
https://discourse.agopengps.com/t/use-guidance-systems-that-accept-nmea-0183-messages-in-rtk-mode-with-f9p-simplertk2b/8085/1
To connect your f9p to your teejet you cannot use the usb port except to power the card if is necessary. However, you need the beam in red circle on the following image
