IBM PS/2 90 XP 486 Hardware Maintenance Reference page 21

IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR
Keyboard Connector and Pointing-Device Connector
2.3.8 Keyboard Connector and Pointing-Device Connector
The two 6-pin connectors on the rear of the system board are for a
keyboard and a pointing device (mouse). The keyboard connector is marked
on the back panel of the system unit with a keyboard symbol. The pointing
device connector is marked with a mouse symbol. The interface logic is
the same for both and they are interchangeable.
¦ Copyright IBM Corp. 1990, 1992
2.3.8 - 1