Changing Head Unit

[vandammit]

On my Mk3 Astra I have rather stupidly chopped off the plug for the headunit/MFD could someone please tell me which colour wires I should be connecting upto the battery live/earth/illumination/ignition?

Also should I be doing anything with the other wires? I don't use the speakers because I run an amp from the boot but what about the 4 brown wires that I assume were for the MFD? Do I need to earth these or join them together?

 

[vandammit]

Some more information, there are 2 wires going into each section of the bottom part of the plug, is that standard?

The layout is
1 2 3 4
5 6 7 8

1. 2 x blue/red
2. EMPTY
3. red/grey & black/white
4. 2 x red
5. EMPTY
6. 2 x black
7. 2 x grey/green
8. 2 x brown