Hey guys! I started the build today and the out-of-case boot went fine! I mounted the motherboard, power supply and started hooking things up, but I'm purplexed.. Where do my case fans hook in? They have a 3-pin connected to another three pin which ends up being a 4-pronged thing. I looked in the manual and it's not 100% great with details. I don't see any spots that come out to support the 4-pronged pin.. Do I need an adapter or something?