So I was flying my wing and it crashed

The motor mount flew off breaking foam on the wing...
So now there's a big hole at the back where the motor should've been mounted


How do i fix this 

If you have the part that broke off, first test fit and see if it fits perfectly and there isn't alot of gap, if it fits well then use araldite 5min epoxy to fix it in place permanently.

Regards,
Mohammed Naveed