Seems the larger board on the bottom is the daughterboard, and all of the pots, connectors, power, and LCD are connected to the smaller main board.
Not much room in the case at all -- you'd be pressed to fit even a 3.5mm stereo port.
MIDI OUT is clearly labelled, as well as a few other test points. I didn't detach the main board, so cannot say if there are any further points of interest on the other side of the board.
Full-size version of picture #2: http://i.imgur.com/PVxlSq6l.jpg