Wow! I forgot about those things.
Back in the day when the ST's were new, the safari cage extension was considered an option.
When the factory or dealers added the safari cage extension they removed those parts and gave them to the new owner.
Although most ST Defenders you see now have the full cage, there are still a few around without them. They have fastback tops and no rear seat.
I probably still have my set from when I purchased my ST.
Thanks for the flashback.