Lenovo ThinkPad X1 Carbon Gen 12 Hardware Maintenance Manual page 66

Type one – Models with 4G wireless WAN card
Step Screw (quantity)
2
M2 × L2 mm, flat-head, nylon-coated (2)
Note: Depending on models, the 4G wirless WAN card may be either 4 connectors or 2 connectors.
Type two – Models with wireless WAN card bracket only
Note: Wireless WAN card bracket is needed for 4G models only.
Step Screw (quantity)
1
M2 × L2 mm, flat-head, nylon-coated (2)
When installing: A reusable 0.5 mm thickness thermal pad for WWAN card is pasted on system board.
Ensure that you keep it when installing a new WWAN card.
60
ThinkPad X1 Carbon Gen 12 Hardware Maintenance Manual
Torque
Color
Black 0.181 Nm
(1.85 kgf-cm)
Color Torque
Black 0.181 Nm
(1.85 kgf-cm)