Forti AP as a wireless client

Hi.

I am playing around with setting up Forti ap as a wireless client.

I have a 90D wifi unit where i can set the wifi in client mode and thats fair and good.

But i would like to set my S321 in client mode as the wifi standarts it runs with would make the setup alot faster.

looked though the CLI and cant seem to find it. anyone knows if its even posible ?