French to English Tech/Engineering Energy / Power Generation Electricity supply to HV grid

More on electricity! Context:
Heading: Definition du point de livraison et de la limite de propriete
Paragraph: "Le point de livraison et la limite de propriete sont situes au point de jonction des installations du producteur au reseau, a savoir immediatement aux bornes aval de la cellule de depart appelee Methane du poste source."
I've got: "The supply point and property limits are located at the junction point between the producer’s facilities and the grid, i.e. precisely at the downstream terminal of the starter cell, named Methane, of the source substation." Does starter cell make sense in this context? Many thanks!