SATA cables.

There is virtually no difference between SATA spec'd cables except for the fastener. SATA2 (SATA 3.0) cables have metal clips but the cables are the same.
 
If a MB was part of your order then you don't need to worry since the SATA cables you'll need are included in the package. I've never actually seen a retail MB package not include any data cables; be they IDE from a few years ago to SATA cables today.