Which colour wire is the positive to the horn , roadster 2014

[Mr G]

Hey guys I am fitting a Denali sound bomb split , I am nearly done buy wonder if you can tell me which wire is the positive which attaches to the horn . Just want to make sure before I connect up .
See picture below .

 

[Gregger]

Blue/black is power. Purple/black is ground through the horn button.

 

[Mr G]

Blue/black is power. Purple/black is ground through the horn button.

Many thanks Gregger .

 

[wjb]

And black and blue is the thumb.

 

[Mr G]

And black and blue is the thumb.

Yep , shut it in the boot of my car lol