looking at the schematic for the 29LX series which i believe is the same board you are looking at (well mostly the same anyway), this would be a part that is going from pin 4 which is the output pin, to PC board ground, and it looks like there is a C44 1uF cap there.
i couldn't see it in the main PC board layout on top of the board, so look for C44 in your radio,and if you cant find it near the audio chip, my best guess is that its the SMT part soldered to the foil side of the board.
LC