Double-click on one of the cables and fill out the dialog box as shown here. Do not change the To Bus or From Bus fields, because that would change the one-line connections. Notice that the Impedance and Rating values are filled in automatically when the Auto-calculate checkboxes are selected. After you have the data entered, click OK.
Figure 1: Entering Cable Data
Use Copy and Paste to copy that cable's data to the other two, just like you did for the motors.
