The other thing I wanted to mentions is, could the top and bottom PCBs have been connected via the open pads around the edge, that way you would have GND over the pads, power on 1 pin and the 9 signals, other wise it must be multiplexed some how, and it wasn't clear from my quick look at the sheet about that.
good luck getting it working, its should be possible, try and trace out the PCB, or at least the key bits where it set up the operating mode via the 2 OP pins. I did try to see it in your image but its out of focus.
... Simon