Rear seat fixing

Hi

I'm new to the forum having just bought an 09 197. Can anyone help me with telling me what my rear seat fixing should look like. Where the two split seats meet and hinge at the base of the seat I noticed the seats move around and having looked at it the small seat has no nut on it at all and the other side has a nut but it is loose. My guess is that both side should have a plastic insert to fill the gap between the seat and metal bracket, or a series of washers. The hole in the seat bracket is much bigger than the screw thread, even if I had two nuts and both were tight I thing it would move around.

Can anyone take a picture of the same place on their car or send a link to a parts guide please.

I was hoping that the seats might be the source of the knocking sounds, but having read the forum I'm sure it must be my shocks!

Thanks in advance
Ciaran