ab6ui
I'm not sure why you needed the jumper wire?? I believe I have the exact same PCB as you.? There is a PCB trace from the top of C8 (junction of C8/L1) that goes to Pin 3 of the LM386.? It is partially blocked in the photo you posted, but I believe it is there.? R0 is in parallel with C8 and both are across the input of Pin 3 of the LM386 to ground.? I did not install R0 on my 49er.
Dave, W0DF