[CMOTD]

Class C #27 Williams- only body located with screws at the front, this is how it arrived and I could not see anywhere the rear body screws (if fitted) would have located onto. So I think this is intentional.

I don't know if it is intentional but, from memory, I think the rear fixing hole is in the base of the rear wing and it needs quite a long screw.

Edit: No wrong again!
   

But as it has a 3D chassis I haven't a clue.