Can't use jboss-admin.sh to add configuration to EE subsystem

Trying to use the jboss-admin.sh to update configuration on standalone AS7 and think I'm missing either some documentation or I didn't understand it.

For this particular example I was trying to disable sub-deployment module isolation as described https://docs.jboss.org/author/display/AS7/Class+Loading+in+AS7 but by using the admin CLI instead
of hand editing XML.

I can "cd" to the /subsystem=ee node fine. I just don't know how to add new configuration.

I'm assuming this is possible in the API but not yet exposed in the tool?