You're getting yourself a bit confused here.
There are basically 3 types of drive SCSI which you won't have and IDE and SATA.
Now SATA are the newest and the fastest drives. IDE drives use what is called a ribbon cable its about 2" across so you can see why its called that. SATA cables are much smaller about half an inch across and you don't have that anyway. Looking at the specs for your computer you have IDE using a ribbon cable.
Your PC is running fine because its setup fine just leave it as is.