Hi Michael,
The value set by "broker_client_timeout_seconds" is not configurable by operations manager. It would require a director manifest change. Here is the reference link that shows where it would be need to be inserted into the manifest.
https://bosh.io/jobs/cloud_controller_clock?source=github.com/cloudfoundry/cf-release&version=198#p%3dcc.broker_client_timeout_seconds
If this is a setting you want to be configurable vi operations manager then i would suggest opening a support request or reaching out to your account representative.