A friend is trying to work out the fittings for a rear louvre that he got for his white car. I haven't seen this louvre before, so can't advise. He says it appears to be painted fibreglass, and he's wondering how secure it will be with 2 top brackets and two at bottom corners slid under the screen rubber. I have seen the factory Accessoire one (green car), and have what may be a South African version (yellow car). Does anyone recognise this version / know how to secure it?