To configure a controller, select it from the list, as shown below:
The screen will appear, allowing you to configure the inputs and outputs of the selected controller:
The section allows you to add, view or edit the inputs and outputs of the selected controller. The screen is very interactive, allowing you to navigate to either the full list of inputs/outputs or to a specific input/output in particular.
To add a new data input, click on the button from either the or screen, as shown below: