Using Slowly Changing Dimensions - SAS Data Integration Studio 3.3 User's Guide - page 209

3 In the column selection window, select the CUSTOMER_ID column and click OK .
The CUSTOMER_ID column displays as the business key on the Business Key
tab, as shown in the following display.
Display 12.8 Business Key Specified for the SCD Type 2 Loader
4 Click Apply to save your changes.
The next step is to specify a generated key for the SCD loader.
Specify the Generated Key for the SCD Loader
Follow these steps to specify the generated key for the SCD loader:
1 In the properties window for the SCD Type 2 Loader, click the Generated Keys
tab.