I'm going to use an NTE956 for the 1.2 volt heater for my VFD display tube. I'm confused about the pinout. The datasheet doesn't make it clear which side is the front in the picture. Is the metal tab at the back of the part as it's pictured? If so then from left to right the pins are: adjustment, vout, vin? Just trying to blow up as few parts as possible, thanks.