An expansion connection module is disclosed for connecting to at least two coil connectors (11) of an electromagnetic switching device (10), in particular a contactor. The expansion connection module includes a housing (2); at least one fastening device for fixing the expansion connection module (1) to the electromagnetic switching device (10) or to a switchgear unit positioned adjacent to the electromagnetic switching device (10); at least two connection openings (3) and at least two terminal blocks (4) associated with the at least two connection openings (3) for the purpose of connecting voltage supply lines; and at least two flexible leads (5) for electrically connecting the terminal blocks of the expansion connection module (1) to the at least two coil connectors (11) of the electromagnetic switching device (10).