Microphone from HU to steering wheel

[Warped]

Hi,

I'm in the process of buying a new HU with bluetooth and don't really know where/how I will placed the microphone. I was thinking about placing it on top of the steering wheel, but I really don't know how to get there. I've seen a couple of tutorial to remove and replace the HU, so I'm fine until there. My problem is once I'm there, will it be easy to pass the cable and make the microphone arrive near the steering wheel? Or do I have to disassemble other parts of the dash?Only tutorial I've found was some thread here saying to check the AC repair manual, but I don't seem to find the right page that only explains the part about the dash removal.

The other solution would be something like this:


But I think this is out of my league...

Thanks in advance,
Nick AKA the car noob