What does this plug into?

[amber comet]

it's from the watercooled CPU mount. it has 2, one appears to be a fan header, but the other appears that it could be if not for being the wrong shape.

[lethal pond]

May be a power plug different from the fan header

[amber comet]

i think it might just be for daisy chaining?

there doesn't seem to be another plug for it

[minor sinew]

what brand cooler is it

[amber comet]

corsair

[minor sinew]

is there a y splitter within the box?

its to connect the 2 fan onto a single fan header

[amber comet]

yeah there's a splitter box

[minor sinew]

does it goes in the box then? which corsair cooler is it

[amber comet]

the boxes pins are 5 but these are 4

im not sure what cooler it is

[minor sinew]

ah then that cable is for the rgb

https://www.youtube.com/watch?v=nMBnz1Ssi08