Argon ONE V2 fan not working!

My Argon ONE V2 fan is not working and I was wondering what pin number is the Argon ONE V2 board using to power up the fan so that I can enable it on /boot/config.txt to see if is going to work.

For those of you facing this problem, it could be cause the argon. service is not running, for some reason even when I tried to start the it didn’t work.
My workaround!
sudo crontab -e
@reboot sudo sleep 30; sudo python3 /usr/bin/