What cable is this

[Coen Duijnhouwer]

Really quick question. What cable is this, and where do I connect it?

Case: Nzxt rog 450
Mobo: strix 370h

Bonus question: What does it do?

https://cdn.discordapp.com/attachments/250959197955555328/416702492399763456/IMG_20180223_220617.jpg

 

[rgd1101]

not showing in the manual?
https://www.nzxt.com/products/noctis-450-rog

 

[bignastyid]

That's the RGB connector as the case is Asus Aura compatible.