Just got a VR Box 2.0 with Bluetooth controller and wanted to give my tips on using this with a Nexus 6 phone. Even with the pads, I could not get my phone inside, so I started ripping it apart. The final method is to take out the springload system in the black removable phone cradle. There are tiny screws holding the springload. Just remove those and the sliding piece and voilà! The phone sits just fine inside! Remember to put the pads around the area that the volume and power buttons sit.
Here is a qr code that someone posted, since it didn’t come with one. Open it with another PC or phone or print it out and use Google cardboard to switch viewer.