How to change memory on PR4100

hello, I just got my cloud today and wanted change the ram to 16gb. I cant find any step by step manual. No pictures, nothing. what I have to take off? what I have to do?

Download the manual from here

https://support.wdc.com/product.aspx?ID=2706&lang=en

Page 106 has the procedure

Thanks. its quite simple. Thank you