This guide outlines the steps to take to convert a CentOS or AlmaLinux server to CloudLinux.
If you purchased a CloudLinux license through cPanel, it is IP based, so there is no activation key. Utilize the following commands to convert to CloudLinux:
sh cldeploy -i
After installation, a reboot is necessary to boot into the CloudLinux kernel.
Official documentation on converting the server is available at CloudLinux.