XPS 420 I/O Pin Assignments (Power/Reset/HDD light/etc)

I have scoured the internet in a futile search for the answer to this question, and I am hoping that I may find it here.  All I need are the pin assignments for the I/O connecter on a Dell XPS 420 Desktop Computer motherboard.

Unfortunately my case was slightly damaged, and although the damage is cosmetic I want a new case with more efficient cooling and no damage.  I know and do not care that it voids my dell warranty.  I have built many computers and I enjoy being my own warranty.  However, this one piece of information is holding me back from the fix.

It's a 40 pin proprietary connecter.  All I need to know is which 2 pins are the Power Connecter, although knowing the reset, HDD light, etc. would also be helpful.

Thanks!