This adapter is only designed for Atari 2600, Sega Master System, and Genesis standard controllers. Other controllers like the Intellivision, Colecovision, Astrocade, or Vectrex use a different pinout and may damage something. The Wico controller is analog so it will not work.
The keypad can be used with the Wico Y cable, I tested it out today.
If some of the buttons are not working, I would wiggle the connector going into the Atari. I've found that any problems getting the adapter to work can be traced to a bad connection. It seems the Atari's controller connector pins like to corrode after 30 years.













