If can't be fixed, I'd duct tape it to finish out the next few days...?- or use earplugs.
the top of the bracket slide has 2 screws to attach the plastic legs cast into the lid- if these legs broke, then it's likely a new lid
she should be able to look between fan blades on the pass side of the lid
looks like this
https://www.amazon.com/Fantastic-Ven...e%2C226&sr=8-4
It's just a few screws to replace it
amazon also has the arm if that is trashed
i almost lost ours in tornadic storm and now have one of those big trash can looking scoops over it- it works quite well but increased my clearance 6" above the AC
mike