Terry,

Im an ozzie and can help.

1) because you have the flap, you system is only a Business Radio unit, no NAV. I actually have the equipment that would fit if you are interested in buying.

2) Picture with fuses.. Nothing goes in there unless in the US they have DSP and a sub-woofer fits.

3) Other side.. nothing either. if you have a NAV unit, then the nav unit is housed in there. Also, the CD stacker is housed in that area as well, but not sure you have that with the Business Radio (I didnt). You wont have an amplifier there (only US with DSP have the amp), but it might be the bluetooth unit.

There are plenty of wiring diagrams if you search a bit (I dont have the links handy at the moment).

Feel free to PM if you want more answers. I have done a Nav retrofit and worked out most of the cables/wires were.

Rob