A method for assembling a connector apparatus (100; 200; 300), comprising the steps of assembling the female connector assembly by providing a female housing (102; 202; 400; 920) forming at least a first aperture (420, 428, 430; 938) and a second aperture; accommodating a first terminal position assurance member (600; 960) within the first aperture (420, 428, 430; 938) formed by the female housing (102; 202; 400; 920); and accommodating a connector position assurance member (104; 204; 500) within the second aperture formed by the female housing (102; 202; 400; 920), wherein the female housing (102; 202; 400; 920) forms a plurality of terminal position assurance protection ribs (416, 418, 442, 444, 446, 448; 934, 936, 944, 946) and three connector position assurance protection walls (432, 434, 436), wherein the first terminal position assurance member (600; 960) has an insertion side and an exposed side, the step of accommodating the first terminal position assurance member (600; 960) within the first aperture (420, 428, 430; 938) formed by the female housing (102; 202; 400; 920) comprises inserting the insertion side of the first terminal position assurance member (600; 960) into the first aperture (420, 428, 430; 938) formed by the female housing (102; 202; 400; 920), and the exposed side of the first terminal position assurance member (600; 960) does not extend beyond an outermost edge of the plurality of terminal position assurance protection ribs (416, 418, 442, 444, 446, 448; 934, 936, 944, 946) formed by the female housing (102; 202; 400; 920), when the first terminal position assurance member (600; 960) is in a preset position, and the additional steps of: providing a male housing (108; 208; 700; 970) forming at least a first aperture (720, 728, 730); accommodating a second terminal position assurance member within the first aperture (720, 728, 730) formed by the male housing (108; 208; 700; 970); and accommodating the female housing (102; 202; 400; 920) into the male housing (108; 208; 700; 970), wherein the male housing (108; 208; 700; 970) forms a plurality of terminal position assurance protection ribs (740, 742, 744, 746, 748, 750; 988, 990, 992, 994, 996, 998). accommodating a first terminal position assurance member (600; 960) within the first aperture (420, 428, 430; 938) formed by the female housing (102; 202; 400; 920); and accommodating a connector position assurance member (104; 204; 500) within the second aperture formed by the female housing (102; 202; 400; 920), wherein the female housing (102; 202; 400; 920) forms a plurality of terminal position assurance protection ribs (416, 418, 442, 444, 446, 448; 934, 936, 944, 946) and three connector position assurance protection walls (432, 434, 436), wherein the first terminal position assurance member (600; 960) has an insertion side and an exposed side, the step of accommodating the first terminal position assurance member (600; 960) within the first aperture (420, 428, 430; 938) formed by the female housing (102; 202; 400; 920) comprises inserting the insertion side of the first terminal position assurance member (600; 960) into the first aperture (420, 428, 430; 938) formed by the female housing (102; 202; 400; 920), and the exposed side of the first terminal position assurance member (600; 960) does not extend beyond an outermost edge of the plurality of terminal position assurance protection ribs (416, 418, 442, 444, 446, 448; 934, 936, 944, 946) formed by the female housing (102; 202; 400; 920), when the first terminal position assurance member (600; 960) is in a preset position, and the additional steps of: providing a male housing (108; 208; 700; 970) forming at least a first aperture (720, 728, 730); accommodating a second terminal position assurance member within the first aperture (720, 728, 730) formed by the male housing (108; 208; 700; 970); and accommodating the female housing (102; 202; 400; 920) into the male housing (108; 208; 700; 970), wherein the male housing (108; 208; 700; 970) forms a plurality of terminal position assurance protection ribs (740, 742, 744, 746, 748, 750; 988, 990, 992, 994, 996, 998). providing a male housing (108; 208; 700; 970) forming at least a first aperture (720, 728, 730); accommodating a second terminal position assurance member within the first aperture (720, 728, 730) formed by the male housing (108; 208; 700; 970); and accommodating the female housing (102; 202; 400; 920) into the male housing (108; 208; 700; 970), wherein the male housing (108; 208; 700; 970) forms a plurality of terminal position assurance protection ribs (740, 742, 744, 746, 748, 750; 988, 990, 992, 994, 996, 998).