ignore the colors this is off another thread....i thought this might help you....looks like pins 44 and 35...i have a I/C sprayer on my car and there are to settings Auto and Manual, when its on auto the I/C light is lit up and when you do it manually all you have to do is push the switch and when using it the light is lit up...so i'm guessing that one pin is for auto and the other is for 35 but thats a guess
so maybe if you hooked up your low level indicator to that pin on the ecu when the meth level is low the indicator sends a voltage and turns the light on?