Missing Fixings rattling side panels

Could someone please confirm if there should or shouldn’t be fixings securing the middle of the side panels to the middle beams?

I have an awful rattle when printing towards the back of the plate and if I apply pressure to the middle of the side panels it pretty much goes away. I also have a P1S that has fixing securing the middle of the side panel and is considerably quieter than the X1C.

It’s the area marked by the bottom red circle where I think it should be secured by a fixing.
Screenshot 2024-01-24 220327

Photo from my X1C

Thanks

I have a converted P1S and have no screw where the AUX fan “would be” if it were on the opposite side. If you have a rattle in the back of the machine, my guess would be on the nozzle wiper assembly. Or more specific, the flap to let extruded filament go down the chute.

I think I dealt with that earlier but I forget what fixed it for me.

ok thanks I’ll check that