Some of those bigger brackets hold the wires down inside the switch, I bought a nice switch from Germany which was look exactly the same it was oem , but when I tried to fit it , it had like 2 less wires the big yellows I think . Watch out for the tiny springs in the left one. Cheers
The switch you are working on has come from a bike where the wiring harness is passed through a hole into the handlebars & has been modified to allow wire to run alongside !!!!!