In order to activate cPanel/WHM license on your server please perform these steps:
1. Buy license by providing existing VPS IP address: https://sxi.io/shop-key/cpanel-whm-nulled.html
2. Install cPanel/WHM OS template from the VPS management panel
If you have installed cPanel/WHM OS template before license purchase, please login to VPS via SSH and execute:
This will refresh license information.