Hi,
Just update the end of the matomo script:
<!-- Matomo Tag Manager -->
<script type="text/javascript">
var _mtm = window._mtm = window._mtm || [];
_mtm.push({'mtm.startTime': (new Date().getTime()), 'event': 'mtm.Start'});
_mtm.push({'userId': userId}); // example of user ID
var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
g.type='text/javascript'; g.async=true; g.src='https://lmatoni1.cm-cic.fr/js/container_xxxxxxxx.js'; s.parentNode.insertBefore(g,s); // Container 1
g=d.createElement('script')
g.type='text/javascript'; g.async=true; g.src='https://lmatoni1.cm-cic.fr/js/container_yyyyyyyy.js'; s.parentNode.insertBefore(g,s); // Container 2
</script>
<!-- End Matomo Tag Manager -->