I just took a look. You are correct. The included power supply has only one SATA power cable. What I can't tell from the specs and the photos is whether that power cable for SATA devices has just one connector or mutiple connectors for two or three devices. If there are mutiple connectors attached to the cable, then you're all set because you can connect multiple devices to that cable. If not, then Sata to molex (or molex to SATA) cable adapters are available for a few dollars from numerous online vendors. Either way you will be okay.