Keeping this easy to use, the Client protal will also allow you to manage your dedicated server by allowing you to Power On/ Off the Server, Re-install your OS, Manage KVM (backend login), Update IP Assignments (including MAC) and your Backup Storage (if bought).
To Access this please go to the client portal dashboard > Your Active Services > Dedicated Server > Manage Server (big blue button)
Manage Server Button
Now you will be redirected to your Server Panel allowing you to control it.