Lenovo ThinkPad P72 Hardware Maintenance Manual page 90

Removal steps of the trackpad cable
When installing:
Ensure that the connector is attached firmly.
Removal steps of the trackpad button board
Step Screw (quantity)
3
M2 × 3 mm, flat-head, nylon-coated (2)
84
ThinkPad P72 Hardware Maintenance Manual
Color Torque
Silver 0.181 Nm
(1.85 kgf-cm)