How do I make the Messaging Chat Widget pop up automatically after the website loads

That is helpful, but which file within my help center contains that snippet?

Where do I insert this code in my template to have this happen?

If you want to add time to load Messaging Widget

<script type="text/javascript">
  window.setTimeout(function() {
     zE(function(){
        zE('messenger', 'open');
    });
    //You can add more APIs on this line
  }, 10000); //time’s in milliseconds - 10 seconds = 100000
</script>

It works well, Thank you!

To whom it may concern:

<script type="text/javascript">
  zE(function(){
        zE('messenger', 'open');
    });
</script>