The assignment of the terminals is in the Click PLC manual available from AutomationDirect. Some have reported that the labeling of the terminals which is printed on the CPU module itself does not line up exactly with the related terminal. Pay special attention near the bottom.
The 'specifications' link next to add-on I/O modules seems to give a pretty good layout of the terminals.
The zip-link modules and cables provide the pinout of their individual components. I believe that the documentation which comes with the zip-link module will provide the module-terminal information and labels to apply to the module. Read the module documentation very carefully.