I am not a fan of drilling or carving into the stock dash, I just don't want to have an "ooops!" and need to repair it, or if I change something there is a left over hole.
I went with the center, so I can make my hole in the dash panel which I can replace, and the passengers have fun honking at the wildlife on the roads.
I don't think I would buy a horn kit when you can buy a horn and a button of your choice on Azon and do the wiring yourself if you have the know how. They are so easy to do!
Horn button is on upper left. I bought the Corbin Works turn signal kit and did not follow those instructions as I put the rockers in the center. I know it goes against how we drive a car but the blinker in the center is handy, I normally steer with my left hand anyway.