While under the car, I also repaired the rest of the wiring for the Kats tank heaters and new coolant pump. I'm glad I did this because during testing, I found out that one of the Kats heaters was burned out from the "incident" after the rainstorm. I replaced that while I had easy access under the car.
Overall, good progress. I've also been researching ways to add cold air conditioning to the car. I'm looking at HEV A/C compressors. Once I find the right solution I'll post more.