How to attach steering controls to a bare wheel?

So, I've got an N16 w/o the HU, twitters and steering wheel controls.
Instead I've got a Pioneer HU, and I want to buy the steering control module and the adapter for the pioneer HU,
Thing is, I haven't the slightest how to attach it to the steering, should there be a cable? do I have to get a wheel that came with the module instead?
 
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