Thanks to Venkat for this tip:
Here is an example SQL statement you can use in a query to pull real-time NT Logical Disk data from all of the agents that have been added to the "MYWIN" Managed System List:
SELECT ORIGINNODE,TIMESTAMP,INSTCNAME,PCUSED FROM KNT.WTLOGCLDSK AT ("HUB_ITMSERVER") WHERE SYSTEM.PARMA("NODELIST", "MYWIN",5 )
In this statement, "HUB_ITMSERVER" is the label (not the hostname) of the TEMS the agents are connected to, "MYWIN" is the MSL name, and the "5" is simply the length of the string "MYWIN".
To find other available table names, the easiest way is to look in the agent application support SQL files on the TEMS.