I'm assuming you want to put a module in the sidebar or some other module position. There's 2 ways to do this.
You can use something like the Advanced Module Manager from NoNumber.
www.nonumber.nl/extensions/advancedmodulemanager
With this, you can set a module to show whenever any component is displayed. Since JFBConnect only has one page, that would work fine. That module is awesome for a ton of other reasons as well.
Alternatively, and slightly harder, you can create a menu item that points to the login register page. You'd do this by creating a menu item of type "external link". In the URL box, use the url of:
index.php?option=com_jfbconnect&view=loginregister
Then, get the ID of that menu from the menu manager (the right-hand column that says ItemId). Finally, you'll need to update the following file to add the ItemID:
/components/com_jfbconnect/controller.php. Line 70. Update the URL with the new ItemID:
index.php?option=com_jfbconnect&view=loginregister&Itemid=xxx
You can then use the Module Manager to add any modules to this new menu item.
We'll try to investigate a better way to make this a menu item that you can easily add modules too.