hello guys..... after my back box fell of the clio i decided to buy another one, its a standard part exactly the same apart from the where the rear mounting bracket fits my old one just slotted through the hole and i screwed in the other side to secure it in place, however the new one is not the same ive got to try and get this ball through the whole so it will stay secure but it wont fit through the whole theres no chance it will fit any ideas?