thats a really nice or should I say interesting example.
Winterised is quite rare. I rebuilt one in the UK 2 years ago and drove it accross Australia.
Seems odd the numberplate on the RHS, may have been done in service, maybe not.
The lower tailgate hole is for the numberplate light as that hinge thing is so the number plate hangs down, whilst the tailgate is open. (never really used as plate was normally on LHS)
http://www.land-rover-lightweight.co.uk/Winterised.html
also http://lightweightlandroverclub.org/phpbb/viewtopic.php?f=8&t=1599&p=12528&hilit=winterised#p12528
Do you have the manuals, as I still got in softcopy
I love Lightweights,,,,, great Land Rovers