How to Connect PS3 Controller with RetroArch 1.5.0?

Title says it all.

How do I configure the ‘Front End’ of 1.5.0 to connect with BlueTooth Stack?

I cannot find the Config File inside the RetroArch folder to configure.

I do not want to use ControllersForAll, since that tweak isn’t all that smart. :f

Whoops. Forgot to add. I’m using an iPhone. iOS 8.4