Trying to set up encrypted forms + ODK Briefcase, can't find JRE installation directory on Mac OS X 10.9

I'm following the instructions here:

https://opendatakit.org/help/encrypted-forms/

and getting stuck on step 3 under Configuration:

Navigate into the extracted directory tree and copy the local_policy.jar

and US_export_policy.jar files to the lib\security directory under the
installation directory of the Java Runtime Enviornment (JRE) of your
computer, replacing earlier versions of these files. On Windows, the JRE is
usually installed here: C:\Program Files\Java\jre6\lib\security

I've installed the JRE, but neither of the paths suggested here work:

Does anyone have JRE running on Mac and can help me find the installation
directory path?

Thanks,
-- Chris

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