Solder jumper, to set the direction of rotation (also in 3D mode)
Telemetry (e.g. On the KISS FC connected to TRX)
Status LED (indicates validity of the input signal)
Motor rotation direction
This needs to be done only if you are NOT using DSHOT!
KISS FC's as well as BetaFlight based FC's do support change of the motor spin direction via GUI / CLI command.
On delivery JP1 (6) is open. If a change of direction of motor rotation is desired, the jumper can be closed. Close the jumper by adding solder to the pads → building a solder bridge