from the Malekko FAQ :
If your power ribbon cable is disconnected from the board on your module, you will need to re-connect it with the red stripe in the proper position on the connector. You’ll see that all the connectors on our modules are labeled with a small “1” and “10” in the corners of the pin header. It’s the “10” that you want to line up with the -12V on your power bus, and this is traditionally lined up with the red stripe on the ribbon cable. For modules that have the pin header oriented vertically, the bottom is the “10” pin, and should get the -12V connection. PLEASE NOTE: the Wiard Oscillator has a vertical power connector. That ribbon connects with the red stripe down!
page Wiard 300