XF 1.2 PIN Button

Hi, I have an add on to add widgets in my right sidebar. At the Pinterest site it says to add a pin badge do this :

Load the JavaScript
Copy and paste this <SCRIPT> tag into the bottom of your page, right above the closing </BODY> tag:

<script type="text/javascript" async src="//assets.pinterest.com/js/pinit.js"></script>

Add the link

Copy and paste this link into your page where you want your button or widget to appear:

<a href="//www.pinterest.com/pin/create/button/?url=http%3A%2F%2Fwww.flickr.com%2Fphotos%2Fkentbrew%2F6851755809%2F&media=http%3A%2F%2Ffarm8.staticflickr.com%2F7027%2F6851755809_df5b2051c9_z.jpg&description=Next%20stop%3A%20Pinterest" data-pin-do="buttonPin" data-pin-config="above"><img src="//assets.pinterest.com/images/pidgets/pinit_fg_en_rect_gray_20.png" /></a>

Where in xenforo do we add above the closing BODY tag for the javascript ???

Thank you.