You can't. The popup box from Facebook has no options for positioning and there's no way to move it.
If you want to use the sharing toolbar on the right side of your page, you'll need to disable the Share button. When you do that, JFBConnect configures the Like button differently in a way that the popup does not display at all.
I hope that helps get you going, but if not, just let us know.
Thanks,
Alex