The following tips and pics were sent in by two of our quasi esteemed customers.. The first was sent in by Sir Adam Winer .. BMW 2006 K1200S owner...

I ran the wires from the right side horn to the left side horn then double up wire in the left side's terminals that in turn then run to the factory wiring. I soldered each wire into the terminal and then use heat shrink tubing to finish and protect the ends.

I used 1/4" split loom to route the wire from right to left just behind the frame where the front engine mounts are. The loop rests of top of the plastic cover that is above the engine heads. I found this the best way to route the wires as in this position they won't be effected by the steering or suspension movements

The next tip and pics were sent in by Sir Steve Linden .. BMW 2005 K1200S owner... ..Thx Steve!!

Just wanted to tell you I installed the horns yesterday and it was even easier than your instructions. First one fit where stock horn was, just as you said, but stock bracket worked better than supplied Fiamm bracket. Found great spot for second horn by removing bolt holding left side of radiator and slipping Fiamm bracket under rubber bushing. Had to twist bracket so one side was 90º from the other, but bracket metal is soft enough to do this easily. Wired both horns directly from 2 wires that go to stock horn (had to cut off sexy plug and crimp on). No need to ground anything. And they're as loud as you said; not as loud as air horns, but they wouldn't have fit anyway.