It's very important to use the required SCSI standard! Look into your AKAI manual and search for the SCSI entry!
Is it SCSI I, II or III, wide or narrow? How many PINs has your AKAI's SCSI port?
Which format does your AKAI sampler provide for its SCSI port? Is it DOS or AKAI OS?
Are you planning to use HD drives as a storage device between them both? Make sure that all devices have their own ID number!!!
All those questions have to be cleared first before you can connect your AKAI sampler to your Mac (or any other computer). Feel free to ask further questions if you're not sure about it!!!

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Greetings from Frankfurt (Germany),
Sheriff ;-)