How to add a SAV 10.1 server into a SAVCE traditional group

Scenario: SWPG is a huge electrical power plant. It's AntiVirus solution is based on Symantec SAVCE 9.0. Now the IT professional of SWPG want to upgrading the SAVCE 9.0 to 10.1. They had a SAV server and hundreds of clients. I thought it's easy and j...