The motherboard manual will have a diagram of the 'front panel connectors'. If you have no manual or can not download one online, use a magnifying glass and look at the front panel connectors on the MB. Connect the power switch lead from the case to power switch connector on the MB. Same with the reset switch, hard drive incicator and so on. It is best to connect the leads from the case to the MB before screwing the board down into the case. Also, using a screwdriver to short the MB front panel power switch connector will jump start the computer.
Old, but perhaps some visual help here.http://www.tomshardware.com/reviews/building-pc,518-14.html