Vans Fuel Gauges

Putting a couple of these gauges in my airplane and I need to know which pole the 12v wires go. There were no instructions with the gauges.

The poles are marked "S" (sender?) "I" (12V? not sure) and G which is pretty safe bet it is ground. Just don't want to burn up anything, anybody know for sure?

thanks

I goes to +V
G goes to ground
S goes to the tank sender

The info for Van's gages can be found here:
http://www.vansaircraft.com/pdf/Gauge_Install.pdf

OK, thanks that is what I thought.