Cipher Suite Security Level for Syslog-ng Store Box

Hi, folks at Balabit/One Identity,

In the Syslog-ng Store Box 6.0 configuration for Cipher Suite, we can configure Syslog-ng web application Cipher Suite Security Level to Secure.

(Basic Settings > Management > Web Interface and RPC API Settings)

We are required to follow a standard to use only 'TLS_ECDHE_RSA_WITH_AES_xxx_CBC_SHAxxx' for the cipher configuration in SSB web application transmission.
I don't think this can be configured using the Graphical user interface (GUI) in Syslog-ng Store Box, how are we able to configure via core-shell command line to meet this requirement?

Thank You!