I made this connector hook into the pot in my dash so that I can still fully remove the dash without having to cut or unsolder any wires. I wrapped it with loom and tucked it up under the steering column.

This box contains a 2.2K resistor for cold weather operation, and a 3.9K for summer operation. The switch simply toggles between the two. Since the pot and resistor combo are temperature sensitive, I made this box to compensate for our extreme seasonal changes.