1973 Blaupunkt Stereo Wiring Help

[klober23]

All of the original stereo wiring is gone in this 1973.5 911 I am working on. The car came with an electric antenna and I would like to make sure I get this all hooked up correctly. I am looking for a wiring diagram or correct pictures for reference.

I assume the red wire from the electric antenna goes in the hole next to the 12v supply on the back? The green wire being a signal wire, but where does this connect?

Thanks in advance.