66 Barracuda radio wiring

Thanks, you mean the green wire not the grey. right ?

Yes, my black has a boot and is male, my green has no boot and is female. For a moment I thought maybe the black should be reserved for a second ("back") speaker, since the idea was to send a second signal to the reverb and let it delay it and cause a sensation of "concert hall" as they say in the manual. Are you sure that your black goes to the single speaker as well ?

Another question, what size condenser is attached to your coil ? My car came with no radio so none of these things are on it.

I appreciate your response.
SC