I bought a used Beetle radio, in the flea market with tape player. I would like to use it at home with a 12volt battery and external speakers. Looking at the back of the radio I find a lot of terminals. Which are the ones for the power and which are the ones for the speaker terminals?

On going through the forums I found that everyone talks of a radio code. Do I need to have that code since the radio is not in the car. If so where do I find it on the radio? I am not much of a tech guy . Please advise.

Thanks.