Cant find SAM for Windows 2008 R2

I have physical access to a Windows 2008 R2 that the client has lost his password for, and I am trying to recover the password.

I am following this guide:

I boot the PC using Kali Live CD
I mount the hard drive
cd /mnt/
ls

I can see the "Users" folder, but no "Windows" folder, and so I am not able to find the SAM files so I can hashcat the passwords

http://www.computersecuritystudent.com/S...G/lesson2/

I am stuck, with nothing to bruteforce

Anyone know what to do for Windows 2008 R2 password recovery? Thanks