Extracting the left circuit board reveals:

Another joystick, which is also soldered in place

Four golden contacts for the D-pad (similar to the ones on the first circuit board)

Soldered-on shoulder button

Another shoulder trigger breakout board

"Back" button

"Home" button

Gamevice has rather unmistakably left its mark here—just in case you wondered with whom Razer partnered up for this controller.