Okay yeah I'm understanding the concept but I think what I'm having trouble visualizing is how is it wired? Where does everything connect together without being interrupted or having something bent or pinched or...

Basically for a rack you usually have the heat tape snaking up in an S pattern (or else have connecting wiring doing the same thing) to create a hot spot in the back, but with the PVC cages they're oriented lengthwise so you'd put your hot spot at one end (for an adult snake using the entire cage) or down the middle (for enclosures with dividers to become essentially two smaller cages). But they open from the front so you can't really use the S style, it would get in the way of the doors???

I'm sure there is something incredibly simple here that I'm missing because my brain has decided to not process it for what ever reason.