Disclaimer!!

Upon going for a ride at speed I've found horn is too dampened being attached directly to the frame and isnt loud enough at higher speeds. I needed to re-do it and still use the bracket and relocate it up in space.. Bracket has a "tuning fork" effect and is needed to make it loud enough......ooops ... sorry!!
All thats needed to do is to swing the bracket up and put a little bend on it so as to not be touching any plastic and deadening the horn. Replace using washers too as they are needed to allow it to vibrate. Dont over tighten this deadens the sound too. I put a little thread lock on it to secure. A bit tedious just for looks but its gone from veiw and just as loud.