Unfortunately, both of those adapters are designed for use with external SCSI devices having High-Density 50 ports, and isn't compatible with the types of data connection interfaces found on SCSI hard drives. Additionally, a hard drive needs its 12/5 volt DC power provided via a Molex power cable. For best results, you should acquire a Mac SCSI controller PCI card, whether using the drive internally or externally. For external use, a SCSI-I/II enclosure that accommodates a 3.5" or 5.25" drive will work. A typical case will have a compatible, internal 50-conductor ribbon cable/connector, that's connected to a pair of Centronics-50 ports on the exterior. Use an active terminator on the unused Centronics-50 port. The Adaptec SCSI card 2906 is a SCSI-I/II (driver-based, non-bootable) controller card and the "Power Domain" 2930** is a SCSI-I/II/III (firmware-based, bootable) controller card. Both of these cards can be found at eBay for very little now. For internal use, a 50-conductor SCSI ribbon cable of adequate length will do, however I prefer to use an active terminator, plugged into the next unused cable connector (after the drive), although installing the drive's termination jumper will also work. I've got an old Quantum 4 GB SCSI drive pulled from an 8600/300, that's in an external enclosure (with Panther installed), as an emergency boot drive for a pair of B&W G3s (with the "2930**" card). While 4 GBs used to seem like a lot of storage capacity, by today's standards, it's not much. Unless you can find the extra hardware for very little cost, your Seagate (ST52160N) 2.17 GB drive may not be worth the effort/expense, given its minimal storage capacity. A sale-priced ($15) 2 GB USB flash memory device will do the same, without the additional hardware.
