Optimus 120-2152 - Manual (Page 9)

Connecting the Antenna
Connect the vehicle's antenna cable to the stereo's large black antenna
connector.
Checking the Connections
Make sure you have securely made all connections before continuing with
the installation.
Connecting the Battery and the Harness
Plug the harness' connector into the stereo's 14-pin wiring socket, then
reconnect the cable to the vehicle battery's negative terminal.
TESTING THE CONNECTIONS
Turn on your vehicle's ignition, install your stereo's control panel
and test the stereo.
The display should light when you press ON/OFF to turn on the stereo.
If the stereo does not work, immediately disconnect the cable from your
vehicle battery's negative (-) terminal. Then recheck your connections.
Caution:
If you played a CD while testing the connections, be sure to remove
the CD from the stereo before continuing.
MOUNTING THE STEREO
Be sure you test the stereo first and verify that it works properly.
Then follow these steps to mount the stereo.
1. Disconnect the cable from the vehicle battery's negative (-)
terminal.
(new illus)
2. Disconnect the wire harness and the antenna.
(new illus)
3. You must remove the stereo's control panel to remove the sleeve
To remove the control panel, press RLS.