i have a sata hard drive that i wont to put in an older mb. i purchased an adpater but i do not know what the larger sata cable if for. there is no place to put it.
There's a third connector you might have noticed, which is the jumper pin settings. You don't need to play with that -- the jumper pins are there for you to set your hard drive into 1.5 GB and 3.0 GB speed modes. By default, it's set to 3.0 GB. You change it to 1.5 GB if your motherboard demands it.
One cable is the power cable and one is the data cable, just like IDE drives have two cables for the same purpose. You will need to have a 4-pin molex to SATA power cable connector and also a hard drive controller card with a SATA port on it for you to be able to connect the drive. If you don't have both of these, you won'e be able to hook up the drive at all.
