An interconnection system for a rack of a system of an aircraft is provided. The rack includes at least one shelf with at least one frame adapted to receive an electronic device, the interconnection system comprising a rear panel, consisting of a printed circuit, the rear panel comprising as many coupling fittings as connectors of the shelf, each coupling fitting being connected to a connector, at least one interface for connecting a lateral panel consisting of an electronic circuit board, the lateral panel comprising: an interface for connecting the rear panel and connectors allowing a connection to the system of the aircraft, the printed circuit of the rear panel allowing a set of predefined electrical links between the connectors and the interface, the electronic circuit board of the lateral panel allowing a set of electrical links to be set up between the interface and the connectors to the system of the aircraft.