Truck Air-Horn Holder

Hi :D

I bought two air horn and both of them were free to move, other problem one of them let air pass easier and the other doesn't like a resistor, and third problem they were with a separate air alimentation.
What i hat to do here was to make them fit near the other one with a fixation for the car (two hole 4mm D with 30 mm entraxe)
The air alimentation is a recycled bycicle valve fixed with plastic glue and it goe to Two hole 12mm D for usual pneumatic tubes that fit on air horn in gene