Posted 19 December 2010 - 12:01 PM
Best bet is to read the the manual that should have come with the case in conjuction with the motherboard. Typically case cabling connectors for the front panel are labled with the corresponding values such as pwr, speaker, HDD, reset, pwr LED, and pwr/sleep LED. If your case contains front mounted USB ports they will connect to a different location. Most cases contain USB connectors that are one peice and plug in one way but some will contain seperate smaller connectors that need to be plugged in individually. Here you will have to reference both manuals since they are not always labeled the same. There should be no ground pin on the front panel connector.
Without knowing what case you used it is impossible to say what the designations my stand for but they should be referenced on some documentation you recieved with the case. As far as the HDD IDE thing it is probably due to the fact that (believe it or not) IDE is still in use and they probably have thousands of those connectors they still need to use.
Get your facts first, then you can distort them as you please.