Placing Probe Elements on Demand Side Nodes

Have gotten in the habit of using Probes to help with my model troubleshooting. Unfortunately, I am having some issues with overheating and underheating on a couple models with VAV terminals with reheat, and to better understand the problem, I am trying to attach probes to the nodes before and after the air terminal.

I can’t seem to be able to figure out do this however; any suggestions?