Looks like you can enable just clicking on respective service,
If you want to enable for HBase,
Ranger -> Config -> Hbase Ranger Plugin (Just Click on OFF and get on and) -> Save the setting.
Eable same for all like YARN -> Config->YARN Ranger PlugIn(save and Restart the Ranger)
please see my screenshot posted or HDP2.3 , there is no such option available for clicking off or on.
what you showed is I think HDP2.5 feature as I can see it in this release.
so my question still remains , how do I enable plugin in HDP2.3 ?
To enable Ranger plugins for HDP 2.3 take a look at the below link. You will have to click on each component link for the steps.
The method you indicated in the second screenshot was only introduced with HDP 2.3.4 onwards.
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