In case anyone else feels the need to disconnect an e-diff, a safer option for the plug and e-diff connector is to remove the e-diff's 40A fuse.
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Rather than adding a new post with photos, I've edited my previous post with photos.
One lesson learned - 10mm spanner (to undo battery terminal) and a torx bit to fit the megafuse is a *really* good idea to take with you on trips.
I had the positive terminal erode due to a faulty battery post leaking acid, I priced the OE one and it included the mega fuse and cable to the alternator $465!
Got one off a LR wreaker complete for $65.
It's good to know that the alternator section of the cable is heavy enough to blow the mega-fuse before it melts the insulation and starts a fire..