Adjustment of rear seats?

[Hammer2001]

How do I adjust the rear seats back rest angle on a 13 plate Alhambra.
The middle row outer seats have a lever on the side that does this. But how do I do it on the middle seat of the 2nd row and the two 3rd row seats?
The manual says these seats have a handle instead of a lever, but I can't see a handle anywhere.

 

[Gerico1000]

I have a '14 plate. I don't think there is an adjustment on the third row, but I'll have a look when I get a moment (I don't use them much).

2nd row middle seat is adjusted with the loop handle that you use to fold the seat. It is fiddly.