Those horns rock and I wish I had gotten them right after I purchased my car.
Here's what I did...
The factory connector is rectangular. I shaved the corners to make it more oval shaped so it would fit in a radio shack connector. That wire and another wire was crimped into the + connector for the 1st horn. That second wire was then connected to the + connector on the 2nd horn. I daisy-chained the grounds the same way and ended it with a ring connector. I sandwiched the ring between the frame and the horn mount. I used the factory L (or something) bracket.
Um... hope that makes sense.
