Select FSAC from the format drop-down, then enter any valid 5-digit Freight Station Accounting Code and click Add Stop or press <Enter>.  FSACs are unique to a given railroad: the same 5-digit FSAC may refer to a completely different location on another railroad. 

If you’re unsure of a particular FSAC or if you receive an error message, enter at least the first three digits of the code immediately followed by an asterisk to invoke a pick list of matches. For example, you could enter “103*” and press <Enter>. Highlight the correct station in the pick list and click OK, or double-click the location to select it.