I'm building a wodden cage for my BP. I've got infared heat lights to keep the temps up to snuff, but would like to add some belly heat.

I have some of this repti heat cable laying around:
http://www.amazon.com/Zoo-Med-Reptil.../dp/B001OVBEEK

One thing I could do is cut a hole in the bottom and attach a plexiglass window. Tape the heat cable to that. I'd really rater not cut a giant hole in the bottom of my cage though. The plexi is going to deform and bow/sag over time I would think. Especially when subjected to heat.

Any other ideas or suggestions on how to add belly heat to a wooden cage would be great.

I also have a UTH I could remove from the aquarium I am currently using.