Meyer,
I can visualize the little flat top post on a sending unit. This must be one of the 'not original' parts. Don't know where you would find a connector for that, other than a junk yard.
The fan motor is quite durable and some folks have skipped the voltage reducer and run it on full 12 volts. It sounds like a 747 at full throttle, and in the end, might affect it longevity somewhat.
Stuart
