When I fitted mine I think I pulled through the strap from the other end so it just went inside the front end. I think the folded over bit of the strap stops where the doubled over bit stops so it doesn't work its way through. Can't remember if I cut of the spare at the back end... I seem to think there is still a bit sticking out the back. This is mine - if you zoom in on the furthest away front corner you can just see a bit of strap sticking out.