Wiring a horn button

[bentaxle378]

Using the steering wheel swap information from http://www.importnut.net, I managed to get my Nardi Steering wheel and HKB hub onto my car without much complication except one big one. The wire from the hub that connects onto the horn button supplies the power..and whenever I tried putting the nardi horn button into the hub and when the horn button comes into contact with the hub, it honks automatically since the hub is a ground, and the horn button is the power...so I cannot put my horn button onto the hub without it honking. How would you solve this? Help would be really appreciated. THanks.