I used the fender mount/ bolts, placed it between that and the horn. Soldered and heat shrinked into the blue wire in headlight wiring, down throughthe hole in the bucket;  I had to alter the holes a bit on the mounting ears of regulator, then just ran down nuts on the fender mounting bolts. Ground wire ran to motor mount bolt. I think it turned out nice, it gets airflow, no more blown bulbs, no hassling with converting to 12 volts !  - I have enough projects....!