Meta Slider - Flex Slider Controls Container

/**
 * INSTALLATION: this code should be pasted into your theme's functions.php file.
 *
 * Compatibility: Flex Slider.
 */
function metaslider_flex_controls($options, $slider_id, $settings) {
    $options['controlsContainer'] = ".thumbnails";
    return $options;
}
add_filter('metaslider_flex_slider_parameters', 'metaslider_flex_controls', 11, 3);