Optimus 120-2113 User Manual page 7

Connecting Two Pairs of Speakers
If you are using both front and rear speakers, follow these steps to
connect the harness to the speakers.
Left
(+) White__________||||
Front
(-) White/Black_____|||
(+) Green____________||
Rear
(-) Green/Black_______|
1. Use a small screwdriver to move 2 ch/4 ch on the bottom of the stereo
to 4 ch (four channel).
2. Connect the gray wire to the right front speaker's positive terminal.
This terminal is usually marked with a plus sign or red mark.
3. Connect the gray/black wire to the right front speaker's negative
terminal. This terminal might be marked with a minus (-) sign or it
might not be marked at all.
4. Connect the white wire to the left front speaker's positive terminal.
5. Connect the white/black wire to the left front speaker's negative
terminal.
6. Connect the violet wire to the right rear speaker's positive terminal.
7. Connect the violet/black wire to the right rear speaker's negative
terminal.
8. Connect the green wire to the left rear speaker's positive terminal.
9. Connect the green/black wire to the left rear speaker's negative
terminal.
Connecting One Pair of Speakers
(connector)
___________
|___________| Right
|||| ||||
||||___Gray (+)
||| |||
|||____Gray/Black (-)
|| ||
||_____Violet (+)
| |
|______Violet/Black (-)
Front
Rear