Uau... Did you make any modification to the eletrical connections ?
I had something similar on my old custom bikes, but it was those sail horns, and mine was about 1 meter long.But the principle is the same: one air compressor that sends the air to the horn. (picture attached)
It drains a lot of current, so I had to make separate electrical wires and connections, I also used a relay so that it did not drains the current from the bikes wires.
CBR500R 2016 Model