Updating Manual Moodle Grade items using Articulate Storyline variables

I have developed an Articulate Storyline course consisting of 4 scenes dealing with different regulatory compliance topics. I am publishing as SCORM 1.2 and uploading into Moodle. 

Each of the topics has a quiz results slide, which then updates a final course master results slide.

The reporting to the LMS in terms of progess works great, but only reports on the master result.

I need to be able to update manual grade items with the quiz results from the individual topic results slides.

Any ideas out there about how I can do this? 

Much appreciated

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