John,
While you have the panel apart, you might want to make the D-180 data port accessible.
Read what WingedFrog has to say about how useful the data is. You have already found one of the 3 wires (wht/yel) that goes down into the tunnel to a serial port. There is an old thread that deals with relocating the serial port and converting it to a USB port and mounting it where it is easy to plug into your computer. Bill H is good at finding those old threads. A Serial to USB Adapter is required. Dynon's part number is 100512-000 for $20.
I download the data after every flight and use an Excel spreadsheet to look at the data.