Enqueues?

add_action('wp_enqueue_scripts', 'topo_enqueue_scripts');
function topo_enqueue_scripts(){
    wp_enqueue_script( 'modale-a-richiesta', WP_PLUGIN_URL . '/Ultimate_VC_Addons/assets/min-js/modernizr-custom.min.js', array('jquery') );
    wp_enqueue_script( 'modale-a-richiesta', WP_PLUGIN_URL . '/Ultimate_VC_Addons/assets/min-js/modal-all.min.js', array('jquery') );
}