I assume you are talking the door munion heater. Is that correct?  Use a foil high temp tape to hold it in place during reinstall of the munion. Make sure to replace the fiberglass sleeves. Here is the manual for it. http://www.americanpanel.com/materials/man.pdf
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What are your door dimentions? What voltage are you running? You can contact them at (352) 245-7055 Most of there doors have a snap channel that the wire goes in.
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