Surge Guard 34830 plug replacement

I finally got in touch with TRC Technical Services. The blue wire is for a thermocouple to detect high heat in the plug. It is molded into their custom made plugs. The tech representative said that the unit will function properly without it other than shutting down for high heat at that connection. Since the plug got hot enough to be damaged without shutting down, I am not that concerned about loosing that feature.

Thanks to all those that responded!!