Lenovo ThinkPad 770 TP 770X User's Reference that shipped with the system - Page 80

Attaching External Mouse, Keypad, and Keyboard, an IBM PS/2 Miniature Mouse

Page 80 highlights

Attaching External Mouse, Keypad, and Keyboard You can use both the IBM PS/2 Miniature Mouse and the TrackPoint as an input device. To connect a mouse other than an IBM PS/2 Miniature Mouse "Disabling the TrackPoint" on page 69. If you want to use both the external numeric keypad and mouse at the same time, first connect the keypad cable to the computer 1 ; then connect the mouse cable 2 to the connector at the rear of the keypad. 1 2 You can remove the keypad cover and use it as a stand for the keypad. 66 IBM ThinkPad 770X User's Reference

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Attaching External Mouse, Keypad, and Keyboard
You can use both the IBM PS/2
Miniature Mouse and the
TrackPoint as an input device.
To connect a mouse other than
an IBM PS/2 Miniature Mouse
“Disabling the TrackPoint”
on page
69.
If you want to use both the external numeric keypad and mouse at
the same time, first connect the keypad cable to the computer
1
;
then connect the mouse cable
2
to the connector at the rear of the
keypad.
1
2
You can remove the keypad cover and use it as a stand for the
keypad.
66
IBM ThinkPad 770X User's Reference