Any filter with an action of 'quarantine' will end up in one of the Policy quarantines.
If your C-Series are configured to send spam quarantined messages to the M-Series, you can configure your filter action to add a header that indicates the message is to be quarantined.
So, for your Russian spam filter:
For the Action, Add header with Header name 'X-Ironport-Quarantine'. The header value can be anything, for instance 'True'
This header directs the IronPort to quarantine the message.