IBM AT 5170 Technical Reference page 90

The following figure shows the layout of the system board.
Rear Panel
1/0
Channel
Connectors
Variable
Capacitor
- - - - - - ,
I
rnrnrnrnrnnrnrn
I
rnrnrnrnrnrnrnrnrn :
@]
Keyboard
Connector
Battery
~:::::;;;oj~
Connector
(J21)
Power
Supply
Connectors
Note: The memory module
layout and system board
dimensions may vary.
1-7 4 System Board