More detail please.
The harddrive is connected to the IDE socket and there usually two. The IDE cable has usually
spare connector unless your existing CD drive is on the same line. In which case it is possibly best to
set the new drive jumper to slave and replace old CD with the new one.
If you intend to hsve it as a second set the jumper to Master
aand connect with a new cable to the unoccupied IDE socket, which is ajacent to the one feefdng the HDD and CD