Basic gauge wiring question
 

Hi,
I have purchased a Autometer 4337M Water Temp Gauge and have an install question re the wiring. I think (hope) it will be simple and able to complete without the aid of an Auto Elecrician.

In short, I am replacing a crappy WT gauge that displays degrees F - very inaccurately. The new gauge (Degrees C) comes with the Autometer sender.
The old sender has 2 "posts" and the new has 1 only. The instructions claim the sender is grounded by the thread.

Can someone make comment based on the attachment.

Please note, I need to retain the "auto switch on function" of the thermo fan with this new gauge.

(Car is a MG Midget with 13B N/A)

THANK YOU!

Problem sorted...
Previous gauge was reading from a second sender....!!!