So about a year ago I had to replace my old head unit in my 2005 Mazda6. I decided to put in an aftermarket head unit instead and bought all the approriate things to do so(new faceplate, harness, and headunit). after installing, I realized that there was no hook up for the top display and also no hook up for the ac buttons above the knobs. Talked to numerous places and they all said there's no way to get the display to work with out a factory head unit. Ideas?