to elaborate on that point, if it is IDE, there should be a group of pins on the back of the drive, usually with MA SL and CS written over it. To set it to slave, just put a jumper on the pins with SL written over them.
However, as stated, if the drive is SATA (which I strongly suspect it is) then all you need to do is plug in a sata cable and power cord. No other configuration needed.