An electrical female connector having an upper open end for an electrical male connector formed with a plurality of partition walls, the electric female connector comprising: a lower plate; a peripheral outer wall extended from the lower plate in a first direction transversely and configured to delimit an inner cavity of the electric female connector with the lower plate, characterized in that the peripheral outer wall has a plurality of slots that is formed along the first direction and configured to divide the peripheral outer wall into a plurality of wall sections; a plurality of protruding side walls each protruding from the peripheral outer wall outwardly and respectively configured to continuously connect at least two divided wall sections of the plurality of wall sections to each other such that the peripheral outer wall and the plurality of protruding side walls are configured to form a continuous exterior wall of the electrical female connector; and a plurality of inward protrusions (190, 192) each protruding inwardly from the corresponding protruding side walls and respectively configured to divide the corresponding slot of the plurality of slots into a first sub-slot and a second sub-slot, wherein each of the plurality of protruding side walls is configured to form a chamber configured to receive a corresponding portion of partition walls of the electrical male connector, and wherein the respective slot and the respective chamber form a cross sectional profile compatible with a cross sectional profile of the corresponding portion of the partition wall of the electrical male connector such that when the partition walls of the electrical male connector are inserted into the chambers of the electrical female connector along the respective slot, the inner cavity of the electrical female connector is divided into a plurality of insulated chambers (111,112,113,114) for each electrical post. a lower plate; a peripheral outer wall extended from the lower plate in a first direction transversely and configured to delimit an inner cavity of the electric female connector with the lower plate, characterized in that the peripheral outer wall has a plurality of slots that is formed along the first direction and configured to divide the peripheral outer wall into a plurality of wall sections; a plurality of protruding side walls each protruding from the peripheral outer wall outwardly and respectively configured to continuously connect at least two divided wall sections of the plurality of wall sections to each other such that the peripheral outer wall and the plurality of protruding side walls are configured to form a continuous exterior wall of the electrical female connector; and a plurality of inward protrusions (190, 192) each protruding inwardly from the corresponding protruding side walls and respectively configured to divide the corresponding slot of the plurality of slots into a first sub-slot and a second sub-slot, wherein each of the plurality of protruding side walls is configured to form a chamber configured to receive a corresponding portion of partition walls of the electrical male connector, and wherein the respective slot and the respective chamber form a cross sectional profile compatible with a cross sectional profile of the corresponding portion of the partition wall of the electrical male connector such that when the partition walls of the electrical male connector are inserted into the chambers of the electrical female connector along the respective slot, the inner cavity of the electrical female connector is divided into a plurality of insulated chambers (111,112,113,114) for each electrical post.