Output Radio Circuit Board to Speaker
The Toshiba TA8167N has single-ended outputs -- the return for both L and R outputs is the GND pin of the chip (pin 9).
Is pin 9 connected to the "-" pin of the connector you showed?

Tuner chips like these are rarely connected directly to a speaker.
More typically, the tuner chip output pin is connected through a 4.7 uF capacitor (as shown on p. 8 of the TA8167N datasheet) to a "volume knob" connected to an audio amplifier such as the
Texas Instruments LM386N-4, as shown on p. 6 of the LM386N-4 datasheet.

The LM386N-4 and many other audio amplifiers are also single-ended -- the return is the GND pin of the chip.
You'll need 2 such audio amplifiers (or a "dual amplifier"), one to amplify the L signal and the other to amplify the R signal.

(Could you show a photo of the entire PCB? Perhaps your PCB already includes a volume knob and perhaps even an amplifier).