fuel level

I have a 06' 320 with a pair of 350 MAG MPI inboard v-drives. I have not had much time to sort through the stbd engine harness but I am looking for the where the connection is for the starboard smartcraft fuel level sensor. I had some engine work done and now have suddenly lost fuel level on my...

I just installed a terrific Garmin chart plotter and GFS10 fueld monitors on my twin 4.3 IOs. The last step is to hook up the fuel tank. I need the ignition switch and the fuel level. I pulled the gauge and have 4 wires. Does anyone know which two I need? Thanks, Mark