no splitters needed in my case, the 3 rgb case fans are all connected to motherboard headers, and there are still 2-3 leftover. and if i remember correctly, the radiator fans connect to the pump so they didn't have to go into fan headers.
when i was first building it literally took me 15 minutes trying to figure that out lol. hope i'm not too late to respond to this but you just gotta put force into it and rip it off. i was scared of breaking it but it snaps right back into place!
when i first started learning about computers, i think i was just so appalled at the fact that one part could be so expensive, which made me go a little cheap haha. plus the laptop i had been eyeballing also had a 1070. i'm definitely already thinking about a graphics upgrade though!
so, from the picture, it looks like you got the h100i v2 on the front of the case, right? just making sure because i'm highly considering the 275r, but the corsair website says 240mm radiators will fit on the top, while 280mm radiators will fit on the front. i can deal with either, but looking at your build, i really like how it looks in that spot!
i'm thinking about buying the spec-omega case, how many extra case fans did you install? i know the two that come with the case probably won't give me the airflow i need.