Unbelievable that Wix do not know how to do this for one of the largest ratings site in the UK. I need to do this too. The question is how to you insert code between . To make the Trustpilot link work we are required to do this:
Copy-paste this code inside the section of your website’s HTML or as close to the top of the page as possible.
<!-- TrustBox script -->
<script type="text/javascript"src="//widget.trustpilot.com/bootstrap/v5/tp.widget.bootstrap.min.js" async></script>
<!-- End TrustBox script -->