ELECTRICAL CONNECTION CORSA INJECTOR

Good morning, someone can teach me the function of the electrical components of the pump. (Attached photo to identify the pump type) It has three chips: one two -way that goes near the gear, another three -way on the acceleration mechanism, and another three -way in a black box on the side where the pipes of the injectors leave. Thank you very much for the help you can give me.
Cordial I greet everyone.