Actually go into Dynamo, place the node to inspect, right click > edit and you should be able to access the python nodes within.
Interesting thing happened. When I use JoinGeometry node from Clockwork, and run the script, nothing is being joined.
But when I edit the Clockwork node, copy the Python that is inside, close the node, paste the code into a OOTB Python node, and run the script, it works. Everything is joined 
