Air Horn Installation - 200 Series

[sammoallan]

Hi there, I’m fitting a triple air horn to my 2019 200 series in New Zealand. The fitting diagram has two options depending on whether the vehicle horn is connected to negative or positive wire. Can anyone please advise what the 200 horn would likely be connected to? I can see it is bolted to the front frame which I presume is the negative, meaning the wire from the horn button must be positive (but I may be mistaken!). I need to connect the wire from the relay to the factory horn wire. Thanks in advance. Happy to share some photos of the install if anyone is interested. Cheers Sammo

 

[sammoallan]

The model of horn is a Fiamm Trio MT3i, as used by team cars at the Tour de France.