Sorry about the wait, I finally remembered to take the camera up to the garage...Don't think so it's sticking out towards the back, pic would be great.
This is the right hand side of the helmet, there is the same lug on the left hand side of my helmet but no slotted piece to locate on it.
This is the parts in order that they go together, from the left... that first goes through the helmet head strap, then next comes the black piece with "R" on it, then comes the helmet shell, next is the metal spring washer with the outer edge touching the helmet shell and finally goes on the adjuster nut.
You adjust the nut on each side so there is just enough friction that the helmet stays up but when you nod your head it drops to the lower position, depending on which slot you engage the lug in sets how low or high the welding position is.
If you want more pics just ask.