Anyone know what this cable is for?

[jimbojones]

This came with a Powerbook 3400c I acquired. I know one end is HDI30 for SCSI, anyone know what the other end is?

 

[Fizzbinn]

I think I do! That looks like the SCSI cable for an external Sony CD-ROM “Discman”. 
 

Sony PRD-250 CD-ROM Discman Portable Player (4x speed)

https://docs.sony.com/release/PRD250MC.pdf

or 

Sony PRD-650 CD-ROM Discman Portable Player (6x speed)

https://docs.sony.com/release/PRD650MC.pdf

You can commonly find the drives on eBay but that cable not so much since it only came with Mac “version” (the PC one came with a different cable and PCMCIA card, but it’s the same drive).

 

[jimbojones]

Thank you!