Abstract: A stabilization alignment mechanism and method thereof for providing stalility for an electrical connector assembly, wherein the stabilization alignment mechanism comprises a cap housing having at least one stepped member protruding from an inner wall of the cap housing, wherein the stepped member comprises a first portion and a second portion; a terminal position assurance member having a guide slot configured therein for receiving the first portion of the stepped member; and a plug housing having a receiving slot configured therein for receiving the first portion of the stepped member, wherein the second portion of the stepped member sits on an outer wall of the plug housing. The plug housing slidably and stably mounts inside the cap housing. Moreover, the terminal position assurance member is a movable component within the electrical connector assembly. Furthermore, the first portion of the stepped member stably mounts between two surfaces of the plug housing.