Hi @adzkii, the plugin has a feature which will automatically gather the appropriate resource hints used on your site. All you need to do is have the plugin installed, and a script will run which gathers the URL’s of resources which are loaded from external domains, and creates preconnect resource hints from those. Just open up any page on your site, and those hints will be created (unless they have already been set. In that case you can reset that setting in the “Settings” tab.)
In addition to those automatically created preconnect hints, you may add whichever hints you like.
Please let me know if you need further assistance, I’d be glad to help.