Since pins 1 through 68 are clearly marked on the terminals, I'm guessing that what you really want is the pin out of your DAQ board. That information should be in the manual that came with the board. I could find no reference to a 6204 board on NI's site so I can't point you to an electronic version that you can download. Double check the model number of your board. Once you locate the manual and the pin out of the 68 pin connector on your board, then everything else is simple. Assuming you have a 68 pin ribbon cable connected between the board and the terminal block, then pin 1 on the board is pin 1 on the terminal block, etc.