May sound like a stupid question but....

Space saver spare wheel purchased for my SVR. Remove the boot tray and looks to be an obvious space for it in the well. In the middle of the undertray I have a black plastic shell which I now understand is the shell of the air suspension pump. Should the spare sit on this as it's not a snug fit and there's nothing to secure the spare and stop it sliding around? Hence it seems I'm missing some other items to secure it but I've no idea what as I can't find any pictures online of the spare in situ, try as I might. I've come across LR033234 which seems to be some insulated part for the spare wheel, but no idea where it goes?

Can anyone point me in the right direction?

The space saver sits over the suspension pump and then a black polystyrene circle of sorts goes on top and then a smaller round piece of carpet type material goes in the middle - this has a hole through which the long screw down part goes to secure the space saver from moving around

Thanks, does anything go between the spare and the plastic housing of the air suspension pump?