750 sf-gt Brake lever switch

[squalomediterraneo]

Good morning,
apart from the wires  , which piece is missing to operate the brake lever switch?

I looked at the drawings but I could not figure out what the missing piece is.

 

[MotoJouni]

Long nipple and screw.

 

[squalomediterraneo]

Thanks, I had seen the piece replicated but I had not understood the use.

Now I see the light ... of the stop