installing 3rd internal drive, second ata

[profgaw101]

Can anyone help me to figure out how/what I need to install my second ATA hard drive? It will be my third internal drive. I have a second drive but it is a scsi drive (connected to Adaptec SCSI card) installed on top of the first ATA drive.

I have a G4 400 tower.

Thanks in advance!

:)