How to add GTM code in Carthook app shopify

How to add the Google Tag Manager code in Carthook App Shopify

Here is the solution, You just need to change Google Tag Manager instead of 1234567

(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-1234567');

var iframe_html = '<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-1234567"height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>';
$('body').append(iframe_html);