You can refer to SCCS 4.2 Historical Reporting & Data Dictionary Guide page 35 onwards.
Basically, you need to:
1. Define connection to each SCCS box
2. Define DSN in ODBC Data Source
Otherwise, you can actually modify the sql.ini file in C:\Program Files\Nortel Networks\Symposium Call Center Server\SqlIni\ini folder.
Look for the [ICCM_PREVIEW] and change the IP address to the other symposium box you want to access.
This way, you can keep the ICCM_PREVIEW ODBC connection on the crystal report. However, you need to manually change the ip address everytime you want to access different server.