Optimus 120-2152 - Manual (Page 11)

terminal.
2. If you secured the stereo to an existing mounting hole under the
dash, slide the stereo to the right or left to free the mounting
bolt from the mounting hole.
Otherwise, remove the bolt holding the metal strap attached to the
back of the stereo.
3. Press RLS to remove the stereo's control panel.
4. Insert both of the supplied keys into the slots at the left and
right sides of the stereo. Press the keys downward and slide the
stereo out of the dash.
5. Remove the keys from the slots.
6. Disconnect the wire harness and the antenna.
7. If you are mailing or shipping the stereo, use a small Phillips
screwdriver to reinstall the shipping screw in the top of the
stereo.
6. Reconnect the cable to the vehicle battery's negative (-)
terminal.
USING THE CONTROL PANEL
The stereo's control panel must be in place for the stereo to operate.
When you remove it, the display turns off and the stereo cannot be used.
This is a simple, but effective security measure.
Note:
Any stored stations remain in memory when the control panel is
removed.
INSTALLING THE CONTROL PANEL
1. Insert the left edge of the control panel into the left edge of
the recess. Make sure the pins in the recess fill the holes in
the edge of the control panel.
2. Gently push the right edge of the control panel into the recess
until you hear a click.