Accessing the speedo cable in 75 280z with factory AC

[Scaotty]

So im in the process of removing my dash. I researched this, printed out the step by step procedure, and have about everything completed except unplugging the speedometer cable. Ive searched threads and it sounds easy enough, if you have a 240z. My car is a 75 280z with factory AC(which is also coming out). Is the cable harder to access in the 280z's? Ive located the cable, and followed it up a little ways with my hand, but i dont feel and type of plug. Please help..

[Zed Head]

I have a 76 and I believe that they're the same. I think that you need to remove the tachometer from the front of the dash, then reach in through the hole the tachometer left to unscrew the fitting. It is designed to screw on and off by hand but might be tight after many years, requiring some small pliers to get it loose.