When I bought mine they did not have the neck D rings (it was Exel in a sale so old stock) Horseware were fab and sent me the rings which I put on - they will help you they are great!! Donkey is no longer allowed her neck cover anyway as she has rubbed a great chunk of her mane off
And me (except mine's a Duo). Am not amused. Got in touch with Horseware who sent me a whole bunch of velcro and some rings but I still have to find someone decent to stitch them on - the way they're attached is not exactly simple...