Having labels for AWS WAF F5 Managed Rules

I would like to know how to activate labels for specific rules when I set then to count on my "F5 Rules for AWS WAF - Web exploits OWASP Rules" subscription.
I am having troubles with an specifc rule which is triggering false positive blocks so I would like to create an exception to it when I set it to count, however this option is not available on the aws console. 

What can I do to deal with this situation if I don't have any labels available for the rule?