Jetson Mate power on/off worker nodes

I have the Jetson Mate with 4 SoMs, how exactly do you accomplish “power on/off the worker nodes separately”. When you press the wake button it boots all nodes. Obviously you an do a software shutdown command from the OS to power them off. But how do you power a specific node back on?

i have same problem.
please give me an idea how to power-on to each node individual.