CB Connect - Process required details before account creation

Hello

We have CB Connect currently running on a website and have a few different social accounts you can use. For example if someone uses their Steam login they get their account created with steam details. On the account creation, it asks them for an email address as Steam doesn't pass email addresses.Is there a way we can display other fields along with the email address? We have 2 fields we want to display, a T & C's checkbox and a notification checkbox where if they uncheck then they wo't receive marketing emails from the website etc. At the moment we realised when a users uses any of these Single Sign Ons the T&C gets automatically checked when the account is created.
I know we can set CB Connect to prefill rather than Single Sign, but we want to have the Single Sign On process rather than forcing users to input a password etc.

Is this something we can do in CB?

Thanks

Nope, not unless you use pre-filled mode to pre-fill the registration form.