The 2 pins are most likely for an IR remote or an RF remote, based on what I'm, seeing online about the case.
Is the part that connects to the motherboard a fan header or an RGB header? (The left connector is the RGB, and the right is the Fan header)
My guess is the wire coming off the SATA port is an ARGB header. It doesnt plug into a fan header, but an RGB header on your motherboard. On your board you should have a JRrainbow header (These fans seem to be Addressible RGB which means one of the pins in your header and your plug are "missing")
fatherearth reacted to TVwazhere in Need major help. Case fans not working
