It looks to me, just judging from the pictures, there are 8 fan connections. You can identify a fan connection on a motherboard by looking for these connections
http://www.buildcomputers.net/images/cpu-fan-power-connector-and-header.jpg
There are two connections there, CPU Fan and SYS Fan. Heatsink fans should always be in the CPU fan connection. Any other fan can connect to SYS Fan connections.
That motherboard has, from what I see, 8 connections. One or two of those may be CPU fan connections.
Your motherboard seems to have labeled them CHA FAN meaning Chassis Fan or Case Fan.
You'll find one in the top left, 2 next to the RAM DIMMs, one directly below the RESET button, one in the bottom right, one in the middle along the...