With the exception of a PowerBook (any PowerBook with SCSI except the PowerBook 140 and PowerBook 170) in SCSI Disk Mode, you cannot connect any two Macs together via the SCSI bus...not only is it unlikely that it would work, but also, you run the risk of screwing up the SCSI bus on either machine. If you want to share files between the machines, your best bet is to set up a small network, either using LocalTalk (if its just the two machines, you don't even need LocalTalk/PhoneNET connectors, a standard serial cable, like the one used to connect a Mac to a printer will do) or ethernet.