Toyota Premium Horn

[Meteorite_Marty]

I am thinking of upgrading my stock horn and getting rid of the "meep meep" road runner sound, so other drivers will actually hear my horn and take it seriously. :)

Does anyone have experience with installing these particular Toyota Premium Horn kit? Since there is only one stock horn, can the wiring be split to run to 2 horns instead? Is there perhaps another set of wires to use a second horn? I would like to keep everything Toyota plug and play, I am wondering what my options are to getting the exact plastic connector ends to fit into the horns directly.

I am unsure what the official instructions say, since they are in Japanese. This looks like it assume there are 2 horns on the car already.

Any advice? Please and thank you!