Dell Inspiron 15 (3542, Early 2014) - Manual (Page 29)

Replacing the Wireless Card
WARNING: Before working inside your computer, read the safety
information that shipped with your computer and follow the steps in
Before Working Inside Your Computer . After working inside your
computer, follow the instructions in After Working Inside Your
Computer . For more safety best practices, see the Regulatory
Compliance home page at dell.com/regulatory_compliance.
Procedure
1 Align the notch on the wireless card with the tab on the wireless-card
slot.
2 Insert the wireless card at an angle into the slot.
3 Press the other end of the wireless card down and replace the screw that
secures the wireless card to the computer base.
4 Connect the antenna cables to the wireless card.
The following table provides the antenna cable color schemes for the
wireless card supported by your computer.
Connectors on the wireless card Antenna-cable color
Main (white triangle) White
Auxiliary (black triangle) Black
Post-requisites
1 Replace the base cover .
2 Replace the battery .
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