Adding Javascript to Enfold

I need to add the following code
<script type=’text/javascript’ async=’true’ src=’https://app.ontraport.com/js/ontraport/opt_assets/drivers/opf.js&#8217; data-opf-uid=’p2c156356f19′ data-opf-params=’borderColor=#000000&borderSize=0px&filloutRestrictions=true&formHeight=449&formWidth=100%&maxTriggers=2&onVisitDuration=2&popPosition=mc&timeframe=1&instance=n980655430′></script>

I read it should be added to the footer php before the closing body tag.

This is what I find in it and I’m unsure of where to place it

/* Always have wp_footer() just before the closing </body>
* tag of your theme, or you will break many plugins, which
* generally use this hook to reference JavaScript files.
*/

wp_footer();

?>
‘ id=’scroll-top-link’ <?php echo av_icon_string( ‘scrolltop’ ); ?>><span class=”avia_hidden_link_text”><?php _e(‘Scroll to top’,’avia_framework’); ?></span>

<div id=”fb-root”></div>

</body>
</html>

Thanks in advance