Hello together, I’m about to replace my old Gamma Radio (Audi 80 B3, Built 02/89) with a used Gamma CC. I have 2 boxes in front and two in the back. If I put the adapters from the old Gamma into the new Gamma CC, the rear boxes don’t go. Then I went to the Bosch service to buy the suitable adapter. The Mitabeiter said that would not go because I have no active speakers at the back, which I can’t believe. Have taken pictures of the connections. The 5 Ampere fuse is my old Gamma Radio and so are the connections currently as I have them in my car. The new Gamma CC is with the 7.5 Ampere fuse. Please write me what I can do to make both Lauptsprecher pairs run. The Audi number of the boxes (back) 893 035 412 Thank you in advance. Gruss Ralf