How many of us are there? Owners of Dodge based RV's?

BTW - in the case of dual ballast resistor connectors, there's no need to 'lock' the terminals inside the case. The main purpose of the shell is to make sure the right terminals go in the right place on the resistor. Even if the shell slides up and down on wires, it won't come off and will ensure proper orientation. (That's the reason for the pin on the shell ... otherwise, the shell just insulates the terminals against accidental contact.)