IBM Personal System/2 CL57 SX Hardware Maintenance Reference page 57

7.2 Rear View
1 Release Lever for Battery Pack 1
2 Battery Pack 1
3 Battery Pack 2
4 Release Lever for Battery Pack 2
5 External Power Jack
6 Power Control Switch
7 Machine Identification Label
8 Removable Rear Cover
9 System Expansion Connector
10 Viewing Hole
11 External Display Connector
12 Serial Connector
13 Latch
14 Parallel Connector
15 I/O Panel
16 External Input Device Connector
17 Lid
IBM PS/2 Model CL57 SX HMR
Rear View
_ Copyright IBM Corp. 1991
7.2 - 1