A connector apparatus, comprising: a female connector assembly for receiving a set of terminals, wherein the female connector assembly has an opening at one end thereof, a ramp-like member having an upper part, at least a first window passing through a lower side of the female connector assembly, a second window passing through the lower side of the female connector assembly, and a bridge member disposed between the first and second windows (55, 57); a male connector assembly for receiving another set of terminals, wherein the male connector assembly is configured to receive therein the female connector assembly for engagement thereto; and a connector position assurance device for entering the opening of the female connector assembly, and configured to assure the full engagement of the male and female connector assemblies (5, 3) when the CPA device is at a full-lock position, wherein the CPA device includes a first flexible member having a wedge-like member at an end thereof, the CPA device includes a second flexible member that forms an elongated opening passing through an inner portion of the second flexible member, wherein the second flexible member has a side end portion, the wedge-like member is configured to enter the first window when the CPA device is at a pre-lock position, wherein the side end portion rests upon the upper part when the CPA device is at the pre-lock position, and the upper part is configured to enter the elongated opening of the second flexible member when the CPA device is at the full-lock position wherein the wedge-like member of the first flexible member of the CPA device is configured to enter the second window of the female connector assembly when the CPA device is at the full-lock position, and the wedge-like member is configured to traverse the bridge member and enter the second window when the CPA device is moved from the pre-lock position to the full-lock position. a female connector assembly for receiving a set of terminals, wherein the female connector assembly has an opening at one end thereof, a ramp-like member having an upper part, at least a first window passing through a lower side of the female connector assembly, a second window passing through the lower side of the female connector assembly, and a bridge member disposed between the first and second windows (55, 57); a male connector assembly for receiving another set of terminals, wherein the male connector assembly is configured to receive therein the female connector assembly for engagement thereto; and a connector position assurance device for entering the opening of the female connector assembly, and configured to assure the full engagement of the male and female connector assemblies (5, 3) when the CPA device is at a full-lock position, wherein the CPA device includes a first flexible member having a wedge-like member at an end thereof, the CPA device includes a second flexible member that forms an elongated opening passing through an inner portion of the second flexible member, wherein the second flexible member has a side end portion, the wedge-like member is configured to enter the first window when the CPA device is at a pre-lock position, wherein the side end portion rests upon the upper part when the CPA device is at the pre-lock position, and the upper part is configured to enter the elongated opening of the second flexible member when the CPA device is at the full-lock position wherein the wedge-like member of the first flexible member of the CPA device is configured to enter the second window of the female connector assembly when the CPA device is at the full-lock position, and the wedge-like member is configured to traverse the bridge member and enter the second window when the CPA device is moved from the pre-lock position to the full-lock position.