Just taken the pax seat out.
There are 4x 15mm bolts which hold the seat and an electric wire that connects to the seat but on mine at least isn't plugged in(!!!). I do have pax airbag so clearly that deploys regardless.
Under the seat there are 4 corner rails each held with 2x 10mm bolts. 3 each side come off with a 10mm ratchet spanner, 1 is a pain, 2 are easy.
These just undo.
The 2 "git" bolts which I've heard can't be reached, can, but you need a 10mm socket and extension bar, and "push" between the seat base and the plastic side trim. Feel with fingers, its v v tight but works. All 4 unbolt and the seat is then bare.
**IT APPEARS** as if the mounting holes are in the seat base for the rails same as drivers side. And there are enough holes in the seat frame to match up with most rails, if not easiliy drilled.
It also appears as if the swivel plate fitment will be easier than expected (famous last words lol!)
Watch this space....