what is this wire for?

[mick!]

I cant remember if i had the blue light- I only had quick ride then started taking it apart. Makes sense though , I took the clocks off yesterday to get at the rusty bracket but  looking at wiring connections on fairing lights (its a puig one with two lights-one above other) there is no other connection for this wire so i guess he just  snipped it off. should be easily sorted when i put it back together... Thanks for your help.. mick