Looking at the width of the factory fitted strap on my car, it wouldn't fit anywhere else. (but behind the forward catch) May look a bit paranoid and busy though. If you are set on the strap and the louvres, why not go for the aircraft inspired Dzues fasteners fitted as standard. I know they are fiddly but they don't have the whiff of Halfords about them.
Last edited by Grockle; 28/07/16 12:05 PM. Reason: added info