Correct way to attach MP40 sling?

[MeatGrinder]

Show me the correct way. Thanks.

[MrMurphy]

All the pics I've ever seen, sling is actually to the right, you usually see them slung mag facing left, barrel up over the left shoulder. Either that or slung over the right shoulder with the gun on the bottom ready for use.

[MeatGrinder]

I need pics of how to attach the sling. I've seen a couple different ways.