Hi Vi,
To manually populate a graph, you can transfer the Collection Utility values to the SDK Community Bring Your Own Datasource (BYOD) Component via scripting and assign this datasource to the graph.
As for the Crosstab, unfortunately it is not possible to assign custom data sources, so I don't think there are any options for manually populating it. You will need to rely on making sure the original data source contains the data you need.
Regards,
Mustafa.