How to make sure custom MyFonts license are working

I purchased many fonts on MyFonts and I want to use them on Webflow. But I can’t figure out how can I upload the webfont kit that enables tracking of the fonts use as per MyFonts terms of the license.

Can I simply add the content of the CSS file they want me to upload in the Custom Code section of my project’s setting and add the custom fonts manually with the normal way to add custom fonts in Weblfow?