Calling SetDataOnSimObject etc to change fuel quantity

[Dropbear67]

I think this project may be dead / abandoned but if anyones uses it and can help me..

I can do most things I want but I'm having trouble with the following SDK calls in order to set fuel quantities.

fsx_simconnect.SetDataOnSimObject(StructDefinitions.FuelData, SimConnect.SIMCONNECT_OBJECT_ID_USER, SIMCONNECT_DATA_SET_FLAG.DEFAULT, SendFuel)
fsx_simconnect.RequestDataOnSimObjectType(DataRequests.SetFuel, StructDefinitions.FuelData, 1, Microsoft.FlightSimulator.SimConnect.SIMCONNECT_SIMOBJECT_TYPE.USER)

Basically I just want a way of setting the fuel quantity based on saved values and I can't work out the proper calls in order to do it.
Any help would be appreciated. (im a very basic python programmer so please be gentle)