Back of the module & connectors Representation of the back of the module Power Standard eurorack power -12V / GND / +12V , Red stripe of the ribbon is on the left MicroUSB Micro USB socket, to connect to a computer, used to update the firmware Extension Extension port, used to plug the CV/Gate & Midi extension   Warning ! The ribbon cable must be plugged in the right direction. There is a "RED" inscription on the PCB which indicates where the red stripe of the ribbon should be. Representation of the back of the expander module Warning ! The ribbon cable must be plugged in the right direction. There is a "RED" inscription on the PCB which indicates where the red stripe of the ribbon should be.