Dell Inspiron 15 (7548, Late 2014) - Manual (Page 26)

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 Slide the wireless card at an angle into the wireless-card slot.
3 Press the other end of the wireless card down and replace the screw that
secures the wireless card to the system board.
4 Connect the antenna cables to the wireless card.
The following table provides the antenna-cable color scheme 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 battery .
2 Replace the base cover .
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