Your kit looks great.
I opted out of putting my cables inside the rack. 1st, with the size of my kit I'm not sure they would all fit, LOL. 2nd and more important for me ..... I have replaced probably 6 or more cables in the last year alone. Not something I would want to do if they weren't easily accessible. I use corrugated wire channel on the inside of the rack tubing, which keeps things tidy and for the most part out of view.