Using servo on Mamba F405Mk2 V2

ArduCopter Copter 4.5
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1

I am using Mamba F405MK2 V2
I want to use servo on it.
I’ve tried to wire on Led2 pin, but it does not work.

The official documentation of Mamba F405Mk2 V2 says that there is 5 PWM outputs, 1-4 of which are for motors. (Mamba F405 MK2 Flight Controller — Plane documentation)

So where do i find a pin that corresponds to PWM 5 (again, tried Led2 - not working)

2

Should be the LED pad