Dell Precision M3580 Owner's Manual page 54

Steps
1. Align the notch on the 4G WWAN card with the tab on the 4G WWAN-card slot.
2. Insert the 4G WWAN card at an angle into the 4G WWAN-card slot .
3. Connect the antenna cables to the 4G WWAN card.
The following table provides the antenna-cable color scheme for the 4G WWAN card that is supported by your computer.
Table 34. Antenna-cable color scheme
Connectors on the
WWAN card
D/G
M2
M1
M
4. Align the screw hole on the 4G WWAN-card bracket with the screw hole on the 4G WWAN card.
Antenna-cable color
Black with a thin white
stripe
Blue
Orange
White with a thin gray
stripe
Removing and installing Customer Replaceable Units (CRUs)
Silkscreen marking
6 Aux
8 M2
7 M1
Main 5
△ (white triangle)
△ (white triangle)
△ (white triangle)
▲ (black triangle)
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