Dance radio upgrade ...help !

Can some help me  de-cypher the wiring of the Roomster into what appears to be the original Dance radio.

Upgrading to  a Pioneer 3800 DAB unit , happy to  cut / solder the wiring etc as  like to think  I'm not totally useless , but  having issues with what  is inside the dash. 

The Dance unit had the  brown and Black 8 Pin connectors but also a Blue block ,  having un-wound some of the tape  now found a few  more wires. If any one can explain the combination of  these I would be very grateful . ( grey/brown/black wires ) with the black wire twisted into the green and yellow ) Also what are the two Orange , orange /green wires Dance 10.pubDance 10.pubDance 10.pubDance 10.pubDance 10.pub