You need to enable the Social Profiles - EasySocial plugin that was installed when you installed JFBConnect. Once enabled, go to the JFBConnect -> Profiles configuration area and you'll see those options. You'll also have the option to set EasySocial as the "Registration Component" in the Configuration -> General area.
I hope that helps get you started. Once you have the configuration setup, you may want to check our
EasySocial networking integration guide
for how to add the social login buttons to their main landing page.
Thanks,
Alex