OpenCart Embed Code Instructions
Step 1. Edit file catalog/view/theme/{your-theme}/template/common/header.tpl
Step 2. Paste your Zotabox┬ácode at the bottom inside the {literal} <…> {/literal} tags. Eg.

{literal}
<script type=”text/javascript”>
(function(d,s,id){var z=d.createElement(s);z.type=”text/javascript”;z.id=id;z.async=true;z.src=”//static.zotabox.com/8/9/89722b31c45c09da25fc1fab34ec9f38/widgets.js”;var sz=d.getElementsByTagName(s)[0];sz.parentNode.insertBefore(z,sz)}(document,”script”,”zb-embed-code”));
</script>
{/literal}

Step 3. Save your template file and refresh your website to activate the code.
* You may need support from developer to update code