Dell Inspiron M511R (Mid 2011) - Manual (Page 40)

40 Wireless Mini-Card(s)
Follow the instructions from step 4 to step 8 in "Replacing the Palm-Rest
Assembly" on page 34.
8 Replace the battery (see "Replacing the Battery" on page 16).
CAUTION: Before turning on the computer, replace all screws and ensure that no
stray screws remain inside the computer. Failure to do so may result in damage to
the computer.
9 Install the drivers and utilities for your computer, as required.
NOTE: If you are installing a communication card from a source other than Dell,
you must install the appropriate drivers and utilities.