There is no straightforward way to determine which port within a subsystem an input port or output port of an external block is connected to and what its name is.
The attached "dispconn.m" script file demonstrates how you can determine the ports connected at the input and output of the 'Actuator Model' block in the 'f14' demo model.
You need to make use of similar logic to determine the names of ports within blocks that are connected to any block in your model.
