At work tight now so I can't post pics.
On my stackable enclosures I have all of my connections coming off of the right side and running into Automotive Wire Loom. I used a 1" loom and just run all of the wires through this and then use the adhesive pads that let you attach a zip-tie (sorry, can't remember what they are called) to them to keep the loom in place where I want it.
The only parts of the wires that you see are where the connectors attach to the heat tape.
Check out one-of your local electronic supply stores or automotive stores. The ones around here have lot's of different options for wire coverings.
If you aren't so concerened about "covering" the wires themselves just make sure that all yor wires are routed to a central location and have them tied neatly together.
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