I have a bar mounted under the beak that attaches to the front sub frame with U bolts. I can dig out a link if you are interested and also the eBay lights that I use. I have them wired into a Fuzebox that is switched via the headlight.
I used a Fuzebox to power them. This is wired to the battery and a “switch” wire is taken from the main light which only comes on after the bike starts. Here is the Fuzebox