SUCCESS!
Managed to just pry and pop open a few studs at the back end near the boot opening and unplug the wiring loom i needed from there. Thanks for confirming where i should have been looking.
So now ive 95% of where i need to be. I have a new radio with reverse sensors working, steering wheel controls working.
I have 2 final questions and then ill be set and happy as larry!
On the wiring loom behind the original radio, which wire would be for the Illumination controls, and which wire for Reversing (if any)?
I read on the forums, somebody spliced in to the ground wire of the Hazard light switch, is that recommended or, no?