You'll want to use a relay (or relays) for the actual power switching to these lights, and run the relay switched power directly from the battery (or a buss bar off the battery). The current draw of these lights is too much to just tap into the existing wiring harness of the bike. If you are going to want to have the lights independently controllable, it'll mean two relays and two switches.
When I had aux lights installed I used a single pole double throw switch with the common terminal going to the relay trigger. One side of the switch was just a 12V ignition switched signal so the lights would be on all the time with the bike. For the other side of the switch I tapped into the high beam wire so that the aux lights would switch off and on with the high beams. The reason for that function was that I had the aux lights aimed at the foreground as fill lights for the large area that my HID high beams leave non-illuminated.
Here's a little wiring diagram on how to wire the relays. You can just run the switched output to the lights where I was powering a blue sea Fuse panel.