Mystery wire taped to house battery
Today I was looking underneath my van at the house battery tray, trying to figure out whether or not I could lower the battery myself, and I noticed a thin wire taped to the side of the battery case. Does anyone know the purpose of this wire? The only thing that I could come up with was perhaps it was a thermocouple (or some other kind of temperature sensor) that feeds back to the battery charging system.
Also, can anyone tell me which bolts one must remove to free up the house battery? Are they the four bolts that are nearly level with the bottom of the battery case?
Sorry for the dumb questions, but thanks in advance for any answers.