WAB on wholly disconnected environment with Portal

[NathanEnge]

Hi guys, thought I'd ping the collective. I have a client who has installed Portal wholly disconnected environment. Now they want to build web apps from web maps they have created. I've installed the latest beta on their system, and have tried to deploy it, but it just hangs. Looks like WAB is making calls outside. Where are these calls being made, and how can I redirect them back inside...I've tried to redirect as much as I can like JSAPI, but I read the JSAPI for WAB is different than the JSAPI for Portal? Should I be redirecting to the Portal JSAPI or download the JSAPI from developer.arcgis.com.

Which files and where do I need to make changes to have it work wholly disconnected.