Question regarding steering wheel control.

[avi]

Hi
Would like your help. on the original vehicle's (Toyota Yaris) loom, there are 3 wires for the steering wheel controls - sw#1, sw#2 and sw common. on the hu that I want to install, there are only 2 wires- sw#1 and sw#2. will it function without the common wire, just to ignore it, or is there something that needs to be done? and a second question - at the end of the loom there is a 28 pin connector. from the search I've done, it's hard to find the opposite connector. what would you suggest to do to connect to these 2 or 3 wires without having the suitable connector?

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