function facebook_setup_function() {
    add_meta_box( 'facebook_widget', 'Facebook Moderation Tools', 'facebook_widget_function', 'dashboard', 'normal', 'low' );
}
function facebook_widget_function() {
    include ('facebook.php');
}

add_action( 'wp_dashboard_setup', 'facebook_setup_function' );

add the above to your functions file and replace the include url with the php file you wish to include into your dashboard.

Setting it up ;

Use the facebook.php and add an iframe to it, or ajax call to load the facebook tools, then simply just echo that file into your dashboard page 🙂