I guess this doesn't fully answer your question, but here's the detail on how to remove the non-folding rear seats:
https://www.newtis.info/tisv2/a/en/g...mal/1VnZEKFuvc
You can probably tell from the interior in the rear whether there appears to be any metal bracing that closes the chassis from the trunk. I suspect not, as the chassis is no doubt designed to cater for both folding and non-folding variants.