You've got the pinouts there in your second image, and the connector is on the bottom right of the board. The two single pin connectors with "POWER LED" on them go onto PLED+ and PLED- (matching the +/- on the connector). The 2 pin power switch connector goes on PWRSW (PWRBTN# & GND), orientation doesn't matter. The 2 pin reset switch connector goes on RESET (Ground and RSTCON#; NC is not connected), orientation doesn't matter.
Be careful not to bend the pins, take your time, and compare what you see on the board to the pinout diagram in the manual. Don't use excessive force, they should just slide on easily.