The bottom has a connection system to connect a Wii Classic Pro controller for gaming - a bit top heavy and you need to have the main Wiimote dangling somewhere, but really not bad. This part is a plastic mounting clip glued to the controller with hot glue (colored, black). It has been reinforced with a system of metal rods to increase rigidity.
The top has a clip-on thing from a bag strap, where the matching piece is on a portable speaker. Not really happy about the 7.0 Plus' volume, so this is a nice snap-on for situations where I don't want to use headphones, like watching videos in bed. Again, black hot glue.
The back has a tripod mounting screw which is reinforced by a metal plate and held in place by, you guessed it, black hot glue. Right now I use it with a ripoff SLR gorillapod for hands-free watching in bed. Later I will be making a suction cup system that screws on to the same tripod point.
All pieces can be used together, although I'm not planning on doing so. It will mostly be tripod + speaker and gamepad alone