I've sort of mentioned this before but seeing as how the relays were in front of me and the camera was to hand:
I fitted 2 relays, one for high beam and one for low. There's enough room under the rhs sidecover using heavy gauge self tappers into the airbox to secure them. Mine are in the corner.
The stock wiring harness sends power to the front to the dip switch in the lhs handlebar, then back to the fuse block under the rhs sidecover, then forward again to the headlight. Not very efficient!
Mounting the relays here means the battery is handy, as is the feed from the dip switch. I also fitted a +80% bulb at the time with heavier cable for the relays to the light and got a noticeable improvement in light output.
Its a bit of an overkill now that I have the HID, fitted almost 2 years ago, because it has its own feed from the battery and relay, so all these relays do is feed the HID relay. But if I revert to a QH H4, its still all there .