Dell Vostro 3360 (Early 2012) - Manual (Page 33)

4. Release the speaker cables from their routing and remove the speakers from the computer.
Installing the Speakers
1. Place the speakers on the computer and thread the speakers cable through the routing tabs.
2. Connect the speaker cable to the I/O board
3. Install :
a) hard drive
b) battery
c) palmrest
d) keyboard
e) access panel
4. Follow the procedures in After Working Inside Your Computer .
33