Push to talk button copilot?

[mshac]

I'm no avionics shop, but it sounds like you could run that pair of wires up your yoke on a coil-cord and mount a simple PTT switch. You could even use velcro like the old PTT intercoms. Heck, I've got three or four PTT switches lying around if you need one! The little red ones are the style I have. No matter what, it should be a fairly easy task.