https://www.amazon.com/gp/product/B0086OGN9E/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

these all the way. they are rigid too so if you bend them they stay for the most part.

The R5 was on the table. actually better suited since it has the Perfect amount of bays. but that price tag ughhh. Also this case would be cool for a daily driver case. It has a hot swap 3.5 drive bay on the top. its weird to see on a case

Hmm, I use something like this on a Corsair 750D but the cables on mine have smaller spaces than the product page on Amazon so they're a better fit for drive caddies. (the one I used I got from a local computer store)

Could you use this which comes in a 2 pack: https://www.amazon.com/Cable-Matters-Pack-Power-Splitter/dp/B012BPLW08/

I have 3 of these for my drives. https://www.amazon.com/StarTech-com-Power-Splitter-Adapter-PYO4SATA/dp/B0086OGN9E/ref=mp_s_a_1_5?ie=UTF8&qid=1541457720&sr=8-5&pi=AC_SX236_SY340_QL65&keywords=sata%2Bpower%2Bsplitter&dpPl=1&dpID=41xGVoXngPL&ref=plSrch&th=1&psc=1