Unifaun - Pacsoft Track and Trace URL

functions.php

<?php

/**
 * @snippet       WooCommerce - Sets Tracking URL to Pacsoftonline
 * @author        Redlight Media AB / Christopher Hedqvist
 * @compatible    WooCommerce 3.9.2
 */
function redlight_pacsoft_tracking_base_url( $url, $order_id ) {
    $url = 'https://www.pacsoftonline.com/ext.po';
    return $url;
}
add_filter('ac_wc_unifaun_track_and_trace_base_url', 'redlight_pacsoft_tracking_base_url', 10, 2 );