Not sure if these will help, I quickly just drew them up. Let me know if you run into any more trouble.
Tried to keep them the same colours, take out the bottom tray first (sorry my pic cut off), just stick your fingers in the bottom holes rolleyes and pull away from the engine and slightly upwards, there should be 2 clips holding it in place (light green).
Then you want to take out the Radio and the tray beneath it to reveal the 4 torx screws (red arrows).
You should then be able to remove the plastic (should be 3 clips holding it in place (dark green circles) but be careful as it's pretty easy to crack (as you can see I did to mine). Just drew on those yellow arrows to show where there's space to tuck the cables.
There's another 2 torx screws to take out the aircon too once you've taken off the plastic.
Much appreciated for the info . I will give it a shot tomorrow and see if i can see what is going on back there. I have tried so many times to get the head unit seated correctly, but there just seems to be a serious lack of room back there, just a 1 din unit (same as the standard radio). Cheers ,
Ash