By popular request, photo of the rear mounting point.
It was really easy, all I did was make the front mountings and used shorter box sections at the rear that don't go down to the floor. Then, using angle iron (steel of course) I bent the angle to make a perfect match between floor and the box section, marked the position and welded in place.
Seen here demounted from the floor for clarity,
I didn't put a spreader underneath, as original, the seats are not bolted down anyway at the back. However If you wanted to add a spreader, then this is also child's play
Pics for you
Nothing finer than a Morris Minor