This controller is only required if your motor originally had one of the grey smooth back controllers that came with the early version of MP3 motors. View the third picture for refference. If your original controller has the silver and black face you need the standard Magic pie 3 controller found here
The spade plugs and screws packet is optional. You will only need them if you are going to use them to convert your MP3 motor from the old syle controller to new as there are no spade plugs on the original controller. Most people with newer MP3 or Smart Pie motors don't need them unless you have ruined the ones you have already.
Golden Motor Canada