The Data Collection API is installed in the same process as the SmartSource Data Collector. Instructions are found here.
Configuration is similar to the SmartSource Data Collector. The files for the Data Collection API can be found in the SmartSource Data Collector installation folder under \dcapi.
The Site Map can be found under \dcapi\cfg\webtrendssites.lst. Configuration information for the webtrendssites.lst can be found here.
The configuration file can be found under \dcapi\cfg\msdc_dcapimodule.cfg. Configuration information for the msdc_dcapimodule.cfg can be found here.