Lenovo ThinkPad X1 Carbon Gen 11 Hardware Maintenance Manual page 86

Removal steps of the trackpad (for model without NFC module)
Step Screw (quantity)
1
M2 × L1.8 mm, flat-head, nylon-coated (4)
Installation steps of trackpad
1. A trackpad jig might come with the trackpad which is used for fixing the location of the trackpad. Attach
the trackpad jig to the trackpad and bend the four angles as shown by arrows below.
2. Install the trackpad with jig as shown.
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ThinkPad X1 Carbon Gen 11 and X1 Yoga Gen 8 Hardware Maintenance Manual
Torque
Color
Silver or 0.181 Nm
Black (1.85 kgf-cm)