Originally Posted by earlwb
The 4 wires on mine, from that connector, go to the 2.4ghz RF module.
The small connector with 4 wires (next to the larger connector with 12 wires) goes to the trainer jack. The larger 12 wire connector is to the pots on the two gimbals.
Interesting -mine has 4 wires going to the RF module as well, but two come from the underside of the PCB and two come from the connector (with the two cut wires).
Looking at the photo, it looks like they had to fix a stuff-up - it looks like cut wires (red and orange) were back to front, so they cut them and re-soldered to the back of the PCB the other way around - scary!!
See photo below.