Terminal position assurance with forward interlocking face keying

An electrical connector assembly comprising:

• a cap member having one or more fixed cap terminal position assurance elements defined thereon;
• and
• a plug member having one or more fixed plug terminal position assurance elements defined thereon;
• and
• wherein each of the cap terminal position assurance elements is dimensioned and configured to fixably mate with each of the plug terminal position assurance elements;
• and
• wherein each cap and plug terminal position assurance element comprises:
• a post projecting outwardly from-the respective cap member and plug member;
• and
• a cutout configured adjacent to the post;
• wherein the post of each cap terminal position assurance element and plug terminal position assurance element is generally curvilinear;
• wherein the post of the cap terminal position assurance elements are mated with an oppositely positioned cutout of each plug terminal position assurance elements;
• and
• wherein the cutout of each cap terminal position assurance element and plug terminal position assurance element is generally curvilinear.