I need to insert the following custom code into a JA Wall template before the end of the head section. I couldn't find that feature in the template manager for JA Wall.
<!-- Chatra {literal} -->
<script>
(function(d, w, c) {
w.ChatraID = 'eDXZ9izurZYFeNJiW';
var s = d.createElement('script');
w[c] = w[c] || function() {
(w[c].q = w[c].q || []).push(arguments);
};
s.async = true;
s.src = 'https://call.chatra.io/chatra.js';
if (d.head) d.head.appendChild(s);
})(document, window, 'Chatra');
</script>
<!-- /Chatra {/literal} -->