Seeing the final picture made me think of something: one of my "life hacks" is to not accept cables that are too long. I used to think the longer the better, and just coil it up or something. But long cables just get in the way and collect dust etc.
If something is going to be considered permanent, cut that cable down to length. Either buy shorter moulded cables, or learn to wire cables yourself. Too often have I left a cable long "just in case" only for it to get in the way for years to come.
For patch cables it's easiest and best to buy moulded cables that fit your rack. For things like power cables (extension leads etc.) it's easiest to wire them yourself (at least, in the UK where our plugs are designed to be wired by anyone).