I don't think you can change the origin on those It's in the SQL query but it should be using some of the nimsoft built TOPX query executors. You other option is to just build your own where you can filter the origin. I believe someone posted a server heath report here that you could just import and change to your liking. I would also check the documentation on the query executors maybe they do accept a origin. or possibly modifing the target below not sure if you can put your own target in their.
{"topNReportDefinition":{
"numberOfBars":20,
"statistics":["avg", "max", "min"],
"qos":"QOS_CPU_USAGE",
"target":"{source}"
"period":24,
"periodUnits":"hour",
"groupFirstBy": "source"
}
}