1. The first step is to download the Altaro VM Backup installation setup file from www.altaro.com and then copy it onto the server core.  
2. To do this, simply open a Windows Explorer window and type in the Windows Share location of the Core machine, followed by the drive letter of the system drive (typically “C”), followed by the dollar sign. The format in other words is \\IPAddress\C$ or \\ServerName\C$

Quelle: Altaro Support Center