A device for electrically connecting power distribution plates, comprises a connector fastened to one end of a first plate and comprising power contacts for a second plate. The connector comprises a pair of separate electrical connection parts which together electrically connect two power busbars of the first plate to two power busbars of the second plate and each includes a base for electrically connecting and mechanically fastening the part to a power busbar of the first plate and a power contact branch extending from the base and intended to interact with a power busbar of the second plate.