Quick SCSI question ;)

I have a question about SCSI, if you guys don't mind answering it.

We bought a Dell PowerEdge 1500SC (which I haven't had the chance to examine
yet), which includes an onboard SCSI
controller plus a SCSI hard drive. No other SCSI devices. We bought another
SCSI hard drive, which I want to make part of the chain. To do this, would I
need a "single device" cable plus a terminator, or would I need to replace
the installed cable with a "two device" cable? Sorry, I don't have much
experince with SCSI. One more thing: the controller is "dual channel", if
that helps any. I guess it might also be worth knowing that it's an Adaptec
U160/LVD controller. (Two goats, I know ;)

Thanks in advance!

---
Vitaly McLain <[email protected]>
"Don't worry about people stealing your ideas. If your ideas are any good,
you'll have to ram them down people's throats."
     -- Howard Aiken