Essentially, it’s just an HTML code you insert after uploading the plate:
<a href="[URL LINK TO LICENSE PLATE]"><img src="[PNG IMAGE OF LICENSE PLATE]"style="[A STYLE]"></a>
For more information, you can go to W3Schools and look the tags up. Here, I use <a> to create a link and <img> to create an image for that link. The style tag is for your own choice; here, I use height:50px.