TTikorea TCB-771 Manual De Uso página 14

12. Safety Requirement
The power cable is for 12V/24V DC only. Be sure the transceiver is
off before connecting the leads of the power cable to the power
supply. It is important to observe the polarity even if the unit is
protected against the accidental inversion :
* Red : Positive pole (+)
* Black : Negative pole (-)
The same colors are present on the battery and in the fuse box
of the car.
The unit must be wired for the negative ground only.
To avoid damage, do not operate your CB radio without connecting
a proper antenna.
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TCB-771