HID Retrofit into 2005 Halogens

So I'm doing to do a retrofit with parts from RTS, with a projector of course, and I've got a question about getting a 12V source that powers the kit. I've examined F8L directions intently, but he has HID ballasts wired already, and there are no wiring information there.

I've found one good writeup about wiring ballasts:

http://www.cardomain.com/ride/3963817/2008-toyota-prius-touring-hatchback-4d/page-8

But there's an eyebrow raising part. To power the shutter that controls the high beam mode, this person drills into the fuse box, and gets a live 12V source (!).

Is this really neccessary? Aren't there lots of live 12V connections I can use? Drilling into a fuse box and the attendant wiring involves seems like a kludge if I can instead just daisychain another 12V or something.

 

I've done some research. Basically I have to drill into the fuse box. If anyone has any other tips, let me know.

Also, the F8L thread has alot of discussion of wiring, I'm going to move my discussions there. Sorry for starting another thread, I thought the thread was mostly about headlamps and projectors.

 

Very nice work, looks like the wire comes out of the fuse box pretty neatly.

Well done, thanks for the pic.