The inside of my Futaba T7C and the 2.4Ghz RF module in the center. Notice that I have cut the 3 wires (red,brown,black). You ONLY have to cut the brown wire, if you want to turn off transmitting on 2.4Ghz !

The blue wires, is what you have to look for, if you want to find the right place to connect your LRS - showed with test in red. The green text is about the 2.4Ghz module.

*

Black = GND, Red = Power, White = PPM

Black = GND, Red = Power, White = PPM