Connector arrangement, comprising: a connector (20; 220) having a connector housing (21; 221); and at least one terminal module (10; 210), adapted to be inserted the connector housing (21; 221); wherein the connector housing (21; 221) and the module (10; 210) are provided with guide means (12, 23; 222, 212) to guide the insertion of the module into the housing, wherein the guide means (12, 23; 222, 212) are provided in form of at least one guide rib (23; 212) and at least one corresponding guide groove (12; 222) arranged on respective faces of connector housing (21; 221) and module (10; 210), characterized in that, the housing (21; 221) is provided on at least one side with at least one slot (26; 226) being oriented with a longitudinal axis of said connector housing (21;221) in a coupling direction of said connector housing (21;221), which is adapted to allow an aligning member (31; 231) in form of protruding ribs arranged on a housing of a counter-connector (30; 230) to engage through said slot a part of the module (10; 210) arranged in the housing (21; 221) thereby guiding the module (10;210) into correct alignment with contacts (32;232) of the counter-connector (30; 230), wherein the terminal module is provided with a freedom of movement in at least one axis, such that the terminal module is capable of self-alignment upon coupling of the connector (20; 220) with a corresponding counter-connector (30; 230), wherein the guide means are provided with pre-defined tolerances, chosen so that in assembled condition the module is held in the housing but is free to move to a sufficient extend for the self-alignment, wherein the guide rib (23; 212) and guide groove (12; 222) are dimensioned so that in engaged condition of rib and groove a play remains to allow for the self-aligning. a connector (20; 220) having a connector housing (21; 221); and at least one terminal module (10; 210), adapted to be inserted the connector housing (21; 221); wherein the connector housing (21; 221) and the module (10; 210) are provided with guide means (12, 23; 222, 212) to guide the insertion of the module into the housing, wherein the guide means (12, 23; 222, 212) are provided in form of at least one guide rib (23; 212) and at least one corresponding guide groove (12; 222) arranged on respective faces of connector housing (21; 221) and module (10; 210), characterized in that, the housing (21; 221) is provided on at least one side with at least one slot (26; 226) being oriented with a longitudinal axis of said connector housing (21;221) in a coupling direction of said connector housing (21;221), which is adapted to allow an aligning member (31; 231) in form of protruding ribs arranged on a housing of a counter-connector (30; 230) to engage through said slot a part of the module (10; 210) arranged in the housing (21; 221) thereby guiding the module (10;210) into correct alignment with contacts (32;232) of the counter-connector (30; 230), wherein the terminal module is provided with a freedom of movement in at least one axis, such that the terminal module is capable of self-alignment upon coupling of the connector (20; 220) with a corresponding counter-connector (30; 230), wherein the guide means are provided with pre-defined tolerances, chosen so that in assembled condition the module is held in the housing but is free to move to a sufficient extend for the self-alignment, wherein the guide rib (23; 212) and guide groove (12; 222) are dimensioned so that in engaged condition of rib and groove a play remains to allow for the self-aligning.