Looking at the Logic SCSI chip, we can see (from those photos), Pins 17, 16, 15, 14, and 12 for sure are routed to the DB45, 13 likely is too but need to trace the via on the back of the PCB.
Those correlate to the CS, A2, A1, A0, and GND pins, which A2-0 are the Address lines, defined as...