I remembered how this works now.
This line near the top of the ICM Exported script (usually line ~2):
CVisScript {-1 7 67 2 {0} {0} {38 ScriptStart {2 1 0 3 1}
The third number after the CVisScript, "67" in this example, is the Monitored Node count.
The number immediately before the ScriptStart, "38", represents the number of actual nodes in the script.