Maybe you are looking at the board upside down. I just looked at the manual for your board, and I see no issues. If this is your board: http://www.asus.com/Motherboards/AMD_AM3Plus/M5A78L/
the pinout on page 1-26 shows exactly where the FP wiring goes. What make/model of case's FP wiring are you trying to connect to the board?
The pinout actually shows a connector with 10 pins on top and 10 pins below those for a total of 20 pins. Are you looking at the correct connector on the board?