I'd like to use Cordova Plugins in _blank Inappbrowser

I built two Cordova projects which named P and S.
Then, I put S's www into P's www. By this way, I'd like to make S as a sub-project of P.
Next, one of P's pages uses Inappbrowser to _self open S's index.html.
As a result, S can work well with Cordova Plugins which added by P.
But, when S was _blank opened, it can't use Cordova Plugins.
In short, I'd like to use Cordova Plugins in _blank Inappbrowser.
Could you give me a hand?
Thank you!