Alienware Area 51 R2 Case upgrade help

I am in the process of upgrading my beloved R2 Case.

I plan to put a 

I9 14900k

Asus Tuf z790 plus ATX

Master Cooler MWE Gold 850W Psu

Now I am aware that the cables for the front IO might not work? I don't mind losing the RGB but I kinda need the power button working, and maybe the dvd drive.

Could I get any advice on how to get it all working