Check your owner's manual if you have one. It will tell you what lights should be there. My '72 cluster confused the crap out of me. There's a place for a "Seat Belt" light in the cluster but no such warning light in the cluster as described in the owner's manual. Couldn't find anything to plug in there. I'm leaving it empty.
Never heard of one of those "Low Fuel Economy" AKA keep your foot outa the gas pedal lights. Must have been an oil embargo thing!
^You would be correct. Unfortunately i dont have it wired up right now. But here it is. Instead of temp and oil. I have a "low fuel eco" and an "Engine" idiot light.