Let me preface this by saying, I do not own a right hand drive Land Cruiser…
Wire color is nice for tracking individual conductors… But wire color is not essential for electric current flow. If you use the Nav Delete diagram, I know that it will work for a left-hand drive vehicle, regardless of wire color…I am not aware of any wiring differences between the right hand drive and the left-hand drive, aside from the physical repositioning of some of the controls. It certainly would have been very expensive for Mr. T to completely rewire the control interfaces as differs between left-hand drive and right hand drive… perhaps others with firsthand experience of this condition could chime in.
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