I know it's the right port on the mobo which is the 10-1 AAFP, I know to align the missing pin properly and it goes in only one way. I turned on a flashlight to make sure it was straight as possible but it feels like I would need to use more force... I'm a first time builder so I'm really scared of damaging the AAFP. My motherboard is the Asus Z87 sabertooth and thanks for the help in advance.