I have an Apple II GS with the RamFAST Rev D card and an external hard drive. All of the hardware is from my childhood and I'd like to access the drive to copy everything over via ADTPro. The II GS and external disk drives all work fine. However, I'm puzzling out how to connect and run the hard drive. I have a SCSI cable that connects to the RamFast card, and I have another unknown cable that appears to connect the HDD via a small circular port to either a disk drive or the smart port (see pictures attached). There's also a SCSI terminator. The drive has a power switch and, after talking with my dad, he remembered it requiring a power cable. However, neither of the pairs of ports on the back of the hard drive look like the usual three prong power ports I've seen on other IIGS peripherals online.
Looking over the RamFast Rev D manual (https://archive.org/details/RAMFast_SCSI_Rev._D_Owners_Manual/page/n35/mode/2up?view=theater), on page 35, it sounds like the card can provide power to some peripherals; could that be the case here?
I haven't been able to find the documentation for the hard drive and there's a good chance it's lost.