How to connect Crossfire to RevoltOSD and RevoltOSD Lite
As of this post it is recommended to connect crossfire in the following way. Currently telemetry is not supported in Falco so no need to connect channel 2 on the crossfire to anything. With this setup you will still get RSSI, which can be seen in another FAQ.
The recommended way is to connect channel 1 from the crossfire to the TX 1 pad on the FC. Then connect ground to ground and 5V to 5V. You must solder the TX1 jumper on the edge of the board to Normal.