HTTP Connect without user-agent

Hello,

I need your help in order to create a rule that filter a connection to the proxy with HTTP Connect method but without User-Agent header.

=> I want to bypass authentication and intercept SSL for a specific request to a many used domain.

It seems to me that there is no similar condition as "request.header.header_name.exists = yes | no" for Connect.

If not, do you have another approach to filter this type of connection?

Thanks in advance for your feedback.

Regards