There are no options, currently, to do what you're looking for.
In JFBConnect, we have an option for "Integrate into Joomla Login :". That option will always add it to the bottom of the login form because there are so many different templates out there, it's not possible to add much more customization to how it looks.
To customize the location or button, you'd need to create a template override of the login form by copying /components/com_users/views/login/tmpl/default_login.php to /templates/<YOUR_TEMPLATE>/html/com_users/login/default_login.php and modifying the HTML how you want.
Where you want the buttons to be placed, simply add:
<a id="facebook" href="javascript:void(0)" onclick="jfbc.login.facebook();"><img src="/link-to-your-image.jpg" /></a>
<a id="google" href="javascript:void(0)" onclick="jfbc.login.google();"><img src="/link-to-your-image.jpg" /></a>
With that HTML, you can put the buttons wherever you want and use whatever image you want to use to match up with your site.
I hope that helps,
Alex
Location and size of the Facebook and Google Login buttons
