The PDF documentation is included in the Connector Xpress product download. Once you've installed Connector Xpress you can access the documentation from the Connector Xpress "Help" button.
After installation the doc can also be found here, for example:
C:\Program Files\142\Virtual Appliance Tools\CA-IM_ConnectorXpress\software\html-help\default
C:\Program Files (x86)\CA\Identity Manager\Connector Xpress\html-help\default\index.htm