1. Custom JS
You can include CSS files by adding file path per line. You can use Full URL of the CSS file, or path of the CSS file relative to the Joomla root directory.
Example:
styles.css
OR https://www.somewebsite.com/styles.css
2. Custom JS Files
You can include JavaScript files by adding file path per line.
You can use Full URL of the script, or path of the script relative to the Joomla root directory.
Example:
script.js
OR https://www.somewebsite.com/script.js