92 400E Becker tuner not picking any station after re-install

[ArtZ]

Hoping someone can tell me how the antenna is wired. I had a Kenwood deck installed by "Car Toys" (terrible outfit) and they had a guarantee that they would re-install the original if not satisfied. Was not satisfied, so I had them remove and re-install my original Becker, which worked perfectly before. The deck is back and powers up alright, and the antenna goes up as well, but zero reception fm or am. The cassette player works, but no radio signal. I am hoping it is just a wire they failed to reconnect. Took it back and they claim it is not their problem or warranty to make the old radio work. I know the Becker is a two piece. I bought the tools and pull out the head. all cables look original and connected based on reading other threads here. Now I am looking at the second piece in the trunk, and stuck what to look for next.