I just went outside and looked, Its a green wire with the white stripe.
I used a volt meter's beep setting and stabbed them with the brake pressed. Buuuuuut getting a scotch lock on that wire is one of the most difficult things ive ever done haha. Its a tight fit for one hand let alone TWO! I think I ended up using one but it was a real pain.
If I were to do it again, I would just run a long wire from the rear brake lights since they are so easy to access.
maybe someone has an easier idea but thats all I know.