Thanks! I have this stuff (
https://www.homedepot.com/pep/YICHU...M2h9H9uB-oEzcfIZgXEc2OgROeYpq0BxoCgpwQAvD_BwE) and right now I have the flat piece mounted on the back of the sump and plan to run all the wires through that.
For the controller board I plan to use zip ties and run all the cords either through the holes or just pull them up from the bottom as it's open.
I plan to add a back to the controller board that is at the end of the sump under the tank to close that up as well. Unfortunately wire management would be something that would alleviate a lot of stress/frustration every time I walk by the tank and see the mess (at least it's way better than it was!) and make things look awesome but I work 50-70+ hours a week so it's hard to prioritize it when everything is working when I have tons of other things to do that need to be done as normal maintenance