Installing new HDD

I’m trying to install another HDD, i have all the relevant cables (i think), this is what i have: http://www.amazon.co.uk/Wired--Up-SATA-Power-Adapter-Cable/dp/B000ITL1PG/ref=sr_1_3?ie=UTF8&qid=1368561670&sr=8-3&keywords=sata+cable And this is the HDD i have: Seagate Barracuda 3.5 inch 500GB 7200 RPM 16MB 6GB/S Internal SATA Drive: Amazon.co.uk: Computers & Accessories...