Install guide
Wix exposes a Custom Tracking Tools section — paste the snippet there and publish.
<!-- Wix → Settings → Tracking & Analytics → New Tool → Custom -->
<script src="https://api.sourcetrace.xyz/t.js?key=YOUR_API_KEY" async></script>Replace YOUR_API_KEY with the key from Settings → Sites.
Wix dashboard with Tracking & Analytics open.
The Custom Tracking Tool form with the snippet pasted.