I found the System Panel Header, now I just need to plug em' in.
What you're looking for is the "System Panel Header" on that picture you gave, #16. If you grab the "Quick Install Guide" from http://www.asrock.com/MB/AMD/880GM-LE%20FX/index.us.asp?cat=Manual, you'll find the pinouts for the header on Page 23 (edit: bottom of page 23) (second edit: the picture in question is on page 2 of the quick install guide, since the link was removed.)
The two important ones are "PWRBTN" and "RESET". Connect the appropriate button's jumper to the labelled header, and the other side to one of the "GND" pins.
PLED/HDLED are for the power and hard drive lights - the jumpers in that bundle of cables should be properly labelled with + and -... just match 'em up.