VE SV6 rear seats

[h8tensv6]

There isn't a way to open it from the boot. Only option I can see is climb in the boot and try kicking the centre section open. If it is only a plastic clip holding it shut it will come open that way. At worst you will need to buy a new centre section or another rear seat. If you do at least you will get your keys.

 

[Fu Manchu]

Putting a huge steel plate in that location in successive sedan models for decades, there must be a solid reason for that.