Flaps configuration

Good afternoon,
I apologize for the question that for many of you will be trivial.
I am setting up an alien ASW28 moto with FC Matek H743 Wing V3.
I have configured the flaps on servos 7 and 8 and on the radio on channel 5.
How do I connect channel 5 with servos 7 and 8?
Thanks
Walter

Flaperon Configuration — Plane documentation (ardupilot.org)

Auxiliary Functions — Plane documentation (ardupilot.org)

Choosing Servo Functions — Plane documentation (ardupilot.org)

Automatic Flaps — Plane documentation (ardupilot.org)