The screws holding the grill

Question

The screws holding the grill element to the roof of my Electrolux oven have come out.They can be removed in order to clean the roof of the oven. According to the manual, it is easy to s***w these back in place after cleaning
I am unable to locate anything to s***w the grill back in place. Presumably there is aplate of some kind inside the roof of the oven. If so ,how do I access it? Many thanks in anticipation. Mike