We have established the APP at Facebook and have the App ID

We have established the APP at Facebook and have the App ID and Secret Key and the app is activated and working for one site.
The client has 15 different facebook pages, one for each project.
For example, https://www.facebook.com/The-Windrose-at-Weymouth-Weymouth-MA-120487548346168/ shows the page for the Windrose project.
Whereas, https://www.facebook.com/ArborsBedford/ shows the Beford project.
How do I tell the plugin which page to use for each site?
I can't seem to find a WEBSITE TAB as mentioned in the Ultimate Facebook Settings page.
Should I do this via the shortcodes versus a widget?

Thanks.