An electrical coupling assembly for coupling a first circuit board to a second circuit board of an electric motor controller, the assembly comprising: an electrically insulating housing; a plurality of channels through the electrically insulating housing, wherein each channel comprises an open end and a retaining member; a plurality of conductors each arranged in a corresponding one of the plurality of channels and seated against the retaining member of said corresponding one of the plurality of channels and arranged to provide resilient movement of at least part of said conductor in a bias direction along the channel; a restraint (125, 131) adapted to secure the electrically insulating housing to the first circuit board thereby to close the open end of the channels to trap the conductors between the retaining members and the first circuit board and to bias the conductors into electrical contact with an electrical conductor of the first circuit board; characterized in that the restraint comprises at least one clip having a flexible leg, and wherein the at least one leg is arranged to hold the electrically insulating housing against the first circuit board in opposition to the force applied to the electrically insulating housing by the biasing of the plurality of conductors; and wherein the electrically insulating housing comprises a rigid locator adapted to align the electrically insulating housing with a location on the first circuit board prior to engagement of the restraint with the first circuit board and to permit movement of the electrically insulating housing in the bias direction; wherein the rigid locator comprises a locator pin that is longer than the flexible leg of the clip; wherein the at least one flexible leg is adapted to be deflected transverse to the bias direction relative to the rigid locator to allow the electrically insulating housing to be locked in position at the selected location, wherein the rigid locator is arranged to inhibit lateral movement of the electrically insulating housing across the first circuit board, and wherein the rigid locator is adapted to oppose a force transverse to the bias direction on the electrically insulating housing caused by interaction between the restraint (125, 131) and the first circuit board. an electrically insulating housing; a plurality of channels through the electrically insulating housing, wherein each channel comprises an open end and a retaining member; a plurality of conductors each arranged in a corresponding one of the plurality of channels and seated against the retaining member of said corresponding one of the plurality of channels and arranged to provide resilient movement of at least part of said conductor in a bias direction along the channel; a restraint (125, 131) adapted to secure the electrically insulating housing to the first circuit board thereby to close the open end of the channels to trap the conductors between the retaining members and the first circuit board and to bias the conductors into electrical contact with an electrical conductor of the first circuit board; characterized in that the restraint comprises at least one clip having a flexible leg, and wherein the at least one leg is arranged to hold the electrically insulating housing against the first circuit board in opposition to the force applied to the electrically insulating housing by the biasing of the plurality of conductors; and wherein the electrically insulating housing comprises a rigid locator adapted to align the electrically insulating housing with a location on the first circuit board prior to engagement of the restraint with the first circuit board and to permit movement of the electrically insulating housing in the bias direction; wherein the rigid locator comprises a locator pin that is longer than the flexible leg of the clip; wherein the at least one flexible leg is adapted to be deflected transverse to the bias direction relative to the rigid locator to allow the electrically insulating housing to be locked in position at the selected location, wherein the rigid locator is arranged to inhibit lateral movement of the electrically insulating housing across the first circuit board, and wherein the rigid locator is adapted to oppose a force transverse to the bias direction on the electrically insulating housing caused by interaction between the restraint (125, 131) and the first circuit board.