BIG-IQ - management interface SSL certificate

hoping someone can help - i want to update the SSL certificate on the management interface for our BIG-IQ platform but i can't find the option for it anywhere.

my google-fu is not helping with searching for "management interface SSL certificate" because it's just coming up with results for management of SSL certificates, which is what BIG-IQ does :)

can anyone point me in the right direction?

thanks!