To add a 2.5" sata ssd, you only need a sata data cable (I'd suggest a right angle one).  The pc already comes with spare sata power cables.  They are behind the psu in the metal swing out box.
So I am going to add an SSD into the computer. As I understand it I will need a SATA cable. Is a package like this what I need?  
Aurora R5, adding a SSD what cabling do I need?