I'm not familiar with NetFlow Analyzer, but Meraki gear doesn't have an SSH or telnet interface (at least not one meant for the public, I think there may be one for Meraki employees).
You can export Netflow from the MX. The configuration of that is at the bottom of your "Reporting" screenshot. The autoconfiguration feature of NetFlow Analyzer is not needed in that case (and it won't work). You just need to be able to configure it as a Netflow Collector. Maybe it's in the Netflow tab instead of the discovery tab.
Well I'm afraid I can't help you any further then. The only way to solve your issue would be to figure out how to setup the Netflow Analyzer software as a collector without it requiring to have a hand in the configuration of your devices.
If you live by CLI then Meraki is not the solution for you.
If you need netflow, buy traditional Cisco gear, simple as that. I don't run the MX platform myself but there's no reason to denigrate it as "garbage" just because it doesn't have some advanced feature that you think it should. The Meraki platform was meant to be simpler to manage, under the assumption that not everyone needs a Catalyst or similar advanced switch/feature set..