Uniden UM423 AM Owner's Manual page 22

Installing the Hardware
1. Connect the BLACK wire of the included
NEGATIVE (-) side of your power source.
2. Connect the RED wire of the included
(+) side of your power source.
3. Connect the
UM423 AM. (The power connector only fits one way.)
NOTE: To extend the life of the radio, use waterproof tape to seal
electrical connections.
4. Install your antenna according to the manufacturer's instructions.
5. See Antenna Selection and Installation on page 29 for more details.
6. Connect the PL-259 connector from the antenna lead-in wire to the
SO238 connector labeled ANTENNA on the back of the UM423 AM.
Radio connector,
power cable to the power connector on the back of the
SO238 (female
PL-259)
power cable to the
power cable to the POSITIVE
Antenna lead-in
connector,
male PL-259
22