Help, I made the mistake of taking apart my center guage console to do some cleaning of contacts and forgot how to hook up the back of the temperature guage. There are three what appear to be copper coated studs and one plain silver stud. There is also a ceramic spacer that I do know goes vertically connecting two of the copper studs. However there is an old fashioned resistor that goes on the back, but I don't know where? Why are there four studs all together and only three wires hook to the guage? Pink (power), Dark Green (Temp.Sending Unit), and Black (ground).