BINGO you put a tiny screwdriver into the holes in the back and move those "funky little tangs". That sets the limits on the meter. I put the sending unit to full and then move those "funky little tangs" to set the meter to F.
Then I put the sending unit to empty and then adjust the "funky little tangs" to the E.
I did have to increase the voltage to 6vdc to get the unit to travel to the F.
I needed to do this a bunch of times to get it set up the way I wanted it.
