Adding URL instead of domain

The cdn_enabler_contents_after_rewrite filter hook can be used to make this addition, for example: https://pastebin.com/gGCdLBRN

In that snippet example.com would need to be different than your primary domain. Does that solution work for you?

So where do I need to add this code in?

One location it could be added would be your functions.php file: https://codex.www.ads-software.com/Functions_File_Explained

Thanks for the help.

You’re welcome, @samuraixx. Happy to have been able to help! If you haven’t already, leaving a review is always appreciated.