The 15 pin is the VGA and the 8 pin is for the touch screen. All you do is plug in the cable to your computer and install the drvier he ships you. It took me a second to find the other power switch that the monitor has besides the one on the front.
As long as the motherboard has a serial port you will be fine.
I just got my NEC in the mail yesterday. Very easy to setup. I'm not sure how I'm going to secure it in my Jukebox yet. I may decase it, not sure though.