Realistic TRC-422A - Power and Antenna System Setup; Vehicle Power Connection; Antenna System Connection

Another extremely important requirement is the ease of installation and
removal (for service and maintenance). Mount the Transceiver so it can
be slipped in and out very easily.
The most common mounting position for a Transceiver is under the dash-
board directly over the driveshaft hump. Do not mount the Transceiver in
the path of the heater or airconditioning air stream.
When you have determined the best location for mounting, use. the
Mounting Bracket as a template to mark mounting holes. Take carewhen
you drill holes that you do not drill into wiring, trim or other accessories.
Mount in position with bolts, lockwashers and nuts or self-threading
screws. Refer to Figure 2 for mounting illustration.
You can install this Transceiver in any location where 12 volts DC power
is available. It can be connected to either positive or negative ground
systems. Just be sure you connect the Red wire to the plus (+) terminals
and the Black wire to the minus (—) terminal.
With Negative Ground
Connect the Red wire (with in-line fuse holder) to the Accessory terminal
on the ignition switch of your vehicle. Make a good mechanical and
electrical connection to the frame of the vehicle for the Black (negative)
wire.
With Positive Ground
Connect the Black wire to the Accessory terminal of the ignition switch.
Connect the Red wire (with in-line fuse holder) to the frame of the
vehicle.
You can use an auto accessory plug (Radio Shack Catalog Number 274-
331) to connect your transceiver to the vehicle’s cigarette lighter plug.
However, it is better to connect the DC power cord directly to the
accessory terminal of the ignition switch. This will prevent unauthorized
use of the Transceiver, and will also prevent you from leaving it on
unintentionally.
Connect the Antenna system to the ANTenna coax connector. If you are
using an external speaker connect it to the EXT SPKR Jack.