must be different on a 1990 defender then
on my 87 ninety they were attached THROUGH the seat box to the chassis mount plates
the bottom mounts on the left and right seats are attached to thick steel plates on the door steels that go between the bulkheads
the middle seat shares the chassis mountings with those of the fixed sides on the left and right seats for its lap belt.
“If you’re going fast enough for an ejector seat moment in a Land Rover, you’ve just driven off a cliff and are stuffed anyway.”
I like it !!! – i have got high compression v8 sitting on my garage floor though….. you have the original 85bhp defender v8 dont you graham ?