Thanks Oli. I do have the rear heater funny thing. I've not taken the cover panel off yet so no idea what it looks like underneath. From what you've said, I will need the spider on the right hand side...You don’t need the spider as we call it . That’s if you have a rear heater. As you already had the threaded holes you don’t need the spreader plates either. It should all just screw straight in from memory. Can confirm tomorrow when I have van in front of me.
I can see it now! I thought the opening was the rear door but I can see it's the side doorThat's correct with the heater you will need it
Pic above should belts in place for third row - this is how yours will look