Hi,
Yikes... That was 9 years ago... Sorry I haven't had the machine for 7 or 8 years and my memory is not what is once was...
As you can see from the pictures all the switches are directly accessible via the pins on the board and can be then wired into something to read them... The same goes for the LEDs on the switches...
If I was going to do it again, I would not bother as after all the work, I never used the panel in real world situations.
Good luck
Simon