plug and play not working

Your schematic tells all. Follow that. My comments are also correct and confirmed by 67Dart273.
I have also installed a unit for test, but was disappointed with the advance curve for my 273. Might work with some engines. For me too little mechanical advance total, but it came on too quick. Needs more upper end advance. Vacuum advance is too much, and not adjustable. It would run the car, but not optimal, better than worn points.