Configuration instructions can be found below.
www.joomlapolis.com/forum/6-news-and-publicity/229505-configuring-cb-connect-7-x
Currently we only provide instructions for Facebook, Twitter, and Google+. The others basically follow the same configuration as Facebook or Twitter in most cases.
Also, at my site, there are some required fields when new users sign up, can these fields be used with CB connect?
Only if you use pre-filled mode otherwise it skips the regular registration process.