According to my ocular CFD, that "RCI" mirror vane will generate a vortice that will help drawing air from those top slits and grills. And the red arrow halo winglets should help too with the low pressure zone they will create below them.
And that very rounded bodywork chape (yellow arrow) is interesting too. there is nothing underneath it and it's not circumventing any engine or a cooling part, so it's there purely for aero. It's similar to a sidepod undercut and it's meant to accelerate air below the Alpine sticker and attract lateral and downwash flow toward diffuser top IMO : )