This is the way it should be connected. Whether it is connected to sata II or SATA III does not matter. As a practical matter, the drive can't run at sata III. It is not capable of those speeds. No mechanical hard drive can even run as fast as SATA II is capable. Some SSDs can but not mechanical hard drives. But, yhis is what the connections should look like. 1 power cable and 1 sata cable, hooked up as shown.