WIP How can I access and use averageFuelConsumption for needle prop?

Greetings

as said in the title: how can I animate a prop needle with the calculated fuelConsumption?

What do I need to do to get the value?

I looked into the etk800 files where it is already done as a digital display. There is a customModules-section, how does this work, and how can I get the value from it?

I need the number to animate a prop.