The SCSI connector on this portable is a square, 6 pin wide 5 pin heigh, female connector and it looks like follows:
| Pin | Name | Description |
|---|---|---|
| 1 | /SCSI.DISK.MODE | Connect to ground to chance powerbook to disk mode |
| 2 | /dbo | |
| 3 | GND | |
| 4 | /DB1 | |
| 5 | TERMPWR terminator power | Not used in 5300c notebook |
| 6 | /DB2 | |
| 7 | /DB3 | |
| 8 | GND | |
| 9 | /ACK | |
| 10 | GND | |
| 11 | /DB4 | |
| 12 | GND | |
| 13 | GND | |
| 14 | /DB5 | |
| 15 | GND | |
| 16 | /DB6 | |
| 17 | GND | |
| 18 | /DB7 | |
| 19 | /BDP | Parity |
| 20 | GND | |
| 21 | /REQ | |
| 22 | GND | |
| 23 | /BSY | |
| 24 | GND | |
| 25 | /ATN | |
| 26 | /C/D | |
| 27 | /RST | |
| 28 | /MSG | |
| 29 | /SEL | |
| 30 | /I/O |