I bought a factory Benelli M4 OEM sling off benelliparts and have no idea how to put it on or use it. It includes no instructions or anything and I know nothing about the sling. This is my first sling, I am right handed, I don’t know where to position it or how to wear it. Any help would be greatly appreciated or I’m just going to return it. Kinda pissed they gave no instructions at all on anything. Thanks.