Dell XPS 15 (L521X, Mid 2012) - Manual (Page 37)

Replacing the mSATA Card
WARNING: Before working inside your computer, read the safety information
that shipped with your computer and follow the steps in "Before You Begin" on
page 8. After working inside your computer, follow the instructions in
"After Working Inside Your Computer" on page 10. For additional safety best
practices information, see the Regulatory Compliance Homepage at
dell.com/regulatory_compliance.
Procedure
1 Align the notch on the mSATA card with the tab on the mSATA-card connector.
2 Insert the mSATA card at a 45-degree angle into the mSATA-card connector.
3 Press the other end of the mSATA card down and replace the screw that secures
the mSATA card to the palm-rest assembly.
Postrequisites
1 Replace the battery. See "Replacing the Battery" on page 22.
2 Follow the instructions from step 2 to step 7 in "Replacing the Base Cover" on
page 14.
Replacing the mSATA Card | 37