Linking FB page to WordPress site

The may be simple and I've installed this plugin before but I'm missing something.

We have a new site under construction and want to demonstrate this plugin.
Installed and created the app on FB, granted permissions but did NOT want to Autopost yet.

Our first step was in using the widgets show the facepile and wall posts.

My Question: By creating the FB app, setting up the API/Secret the plugin still has no idea which page to pull the information from correct? We have to manually configure each widget to pull from the correct fan page?

Seems like there would be a setting somewhere to "use this page/profile" for the widgets.

Am I missing something? The API connection is just a connection between the WP site and FB but there's no setting to which profile/page to use?