One of our gurus here (sandman aka Matt) provides this picture at
his website which answers your question. In this picture you're looking inside the headlight bucket.
Interesting you should bring this up. I JUST added some indicators to my bike and tapped into those same wires in the pictures. In my case I had good ground (earth) so I only had to use the green wire from each pair shown. The black is essentially, ground (earth).
It's tight in there and you'll need patience while splicing and making connections but it's doable. Enjoy!!
