OpsCenter - Adding Master Server Credentials

Hello,

We operate OpsCenter8.1.1 in the following environment.

NetBackup 8.1.1 (Windows)

We'd like to know about "Master Server credentials".
When I click "Test Connection", the following message appears.

#
#Connection successful. The provided credentials are not required for connecting to this version of NetBackup server.
#

Is the credential information I entered used normally?
Even if I enter incorrect credentials, I am wondering because the same message was displayed.