Reddit mentions of AVB Cable AM-1000-BK 1 x 1 Adhesive Cable Tie Holder, Black, Sold 100/ Pack

Just get a bunch of cable, 100 feet or so, and run it along the path you want it to be managed to, and then cut it when it gets to the end.

You can use the zip-tie holders with loose zip-ties to hold the cable as you run it before you terminate to give you a real good estimate.

My two favorite cables to use: Mogami 2944 for my permanent mounted stuff, and then Canare L-4E6S for my temporary stuff. The Mogami is nice and thin and very flexible. The Canare is thicker and beefier, but still very flexible, and comes in all sorts of colors for good identification.

Get a nice soldering iron, a Panavise Jr., some solder, and connectors and get to it.

You can also use string as a temporary run from a pedal to your unit and then transfer the length to your cable.

http://www.amazon.com/Adhesive-Cable-Holder-Black-Pack/dp/B003ZB2A0E

these bad boys. I would take and stick them to the edge of the back of the table and ziptie your cables to it and drop them to each machine. Keeps them off the ground and nicely bundled.

Why not run the drain line to the toilet like its made to do?

if you insist then I'd set it up like a dishwasher you'll need to plumb in a wye slip connect. Cut off the drain pipe below the stopper then put the slip in. From the cat genie to the sink drain you either need to raise it above the sink level or put a check valve in

Chrome slip Wye:
https://www.plumbingsupply.com/images/dishwasher-tailpiece-slipjoint-wye-chrome-lg.jpg

I'm not sure on the catgenie drain hose size but you can use a fernco fitting to change the size around.

2/3 the way down - Wye Dishwasher Tailpieces
https://www.plumbingsupply.com/tubularparts_chrome_polished_brass.html

Ferncos:
https://www.plumbingsupply.com/flexibleconnectors.html

check valves
http://www.amazon.com/Danfoss-0201054-ODF-Check-Valve/dp/B00QW2V9BY

http://www.amazon.com/Thread-Solid-Brass-Check-Valve/dp/B00G9SYYG8

Yea those are ugly and big. I'd just use some stick on zip tie squares to get the cat genie hose up around the sink bowl on the back side, then take it down to the cat genie.
http://www.amazon.com/Adhesive-Cable-Holder-Black-Pack/dp/B003ZB2A0E/ref=sr_1_3?ie=UTF8&qid=1451088887&sr=8-3&keywords=zip+tie+sticky+pad

Ok so it looks like a special case but still see if there's a way to put the PSU upside down.

As for the cables, Zip ties and Velcro are a must have, use the Velcro for practice and the Zip ties for the final touch, group all the cables you're not using(also check for redundant cables, if there's a connection being made with 2 cables that can be 2 with only one then do it), also Zip ties Holder would help too