Lenovo ThinkPad X1 Fold Gen 1 Hardware Maintenance Manual page 52

Put the folio cover on the system board assembly and slide the folio cover as shown in step
on the bottom of the folio cover are latched correctly.
Step Screw (quantity)
6
M2 × L3 mm, flat-head, nylon-coated (4)
46
Hardware Maintenance Manual
Color Torque
Silver 0.181 Nm
(1.85 kgf-cm)
4 until the hooks