blog.grink.tech/custom-theme/templates/include/matomo.html

<script type="text/javascript">
var _paq = window._paq || [];
/* tracker methods like "setCustomDimension" should be called before "trackPageView" */
_paq.push(['trackPageView']);
_paq.push(['enableLinkTracking']);
(function() {
    var u = "https://{{ MATOMO_SITENAME }}.matomo.cloud/";
    _paq.push(['setTrackerUrl', u + 'matomo.php']);
    _paq.push(['setSiteId', '1']);
    var d = document,
        g = d.createElement('script'),
        s = d.getElementsByTagName('script')[0];
    g.type = 'text/javascript';
    g.async = true;
    g.defer = true;
    g.src = '//cdn.matomo.cloud/{{ MATOMO_SITENAME }}.matomo.cloud/matomo.js';
    s.parentNode.insertBefore(g, s);
})();
</script>