Dell Vostro 15 (3546, Mid 2014) - Manual (Page 23)

4. Lift the I/O board from the computer.
Installing the Input/Output (I/O) Board
1. Insert the I/O board into the chassis.
2. Connect the I/O board cable to the system board.
3. Install:
a. palmrest assembly
b. keyboard
c. memory module
d. hard drive
e. WLAN
f. access panel
g. optical disk-drive
h. battery
4. Follow the procedures in After Working Inside Your computer .
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