A connector housing assembly comprising: a mating end and an oppositely facing conductor receiving end, a top wall, a bottom wall and side walls extending between the mating end and the conductor receiving end, a connector receiving passage extending between the mating end and the conductor receiving end; an impedance controlled connector assembly positioned in the connector receiving passage, the connector assembly having a first metallic outer housing and a second metallic outer housing, wherein the connector assembly has a conductor receiving portion, a rib is formed in the conductor receiving portion, the rib extends in a direction which is parallel to a longitudinal axis of the second metallic outer housing; a terminal position assurance receiving recess extending from one of the side walls; a terminal position assurance device positioned in the terminal position assurance receiving recess, the terminal position assurance device having a base with a first surface and an oppositely facing second surface, a first terminal engagement section and second terminal engagement arms extending from the first surface in a direction away from the second surface, wherein the terminal position assurance receiving recess has arm receiving recesses which extend from the terminal position assurance receiving recess toward an opposed side wall, the arm receiving recesses intersect with the connector receiving passage, a locating member receiving recess extends from the terminal position assurance receiving recess to the connector receiving passage, the locating member receiving recess is provided proximate the mating end, the arm receiving recesses have first projections and second projections which extend into the arm receiving recesses, the terminal position assurance device having first and second positions, in the first position terminal engagement surfaces of the second terminal engagement arms are positioned out of the connector receiving passage and in the second position the terminal engagement surfaces are positioned in the connector receiving passage and engage a back surface of a metallic outer shell of the connector assembly to prevent removal of the connector from the connector receiving passage and a terminal positioning surface of the first terminal engagement section engages the metallic outer shell of the connector assembly to further support and stabilize the connector assembly in the connector receiving passage. a mating end and an oppositely facing conductor receiving end, a top wall, a bottom wall and side walls extending between the mating end and the conductor receiving end, a connector receiving passage extending between the mating end and the conductor receiving end; an impedance controlled connector assembly positioned in the connector receiving passage, the connector assembly having a first metallic outer housing and a second metallic outer housing, wherein the connector assembly has a conductor receiving portion, a rib is formed in the conductor receiving portion, the rib extends in a direction which is parallel to a longitudinal axis of the second metallic outer housing; a terminal position assurance receiving recess extending from one of the side walls; a terminal position assurance device positioned in the terminal position assurance receiving recess, the terminal position assurance device having a base with a first surface and an oppositely facing second surface, a first terminal engagement section and second terminal engagement arms extending from the first surface in a direction away from the second surface, wherein the terminal position assurance receiving recess has arm receiving recesses which extend from the terminal position assurance receiving recess toward an opposed side wall, the arm receiving recesses intersect with the connector receiving passage, a locating member receiving recess extends from the terminal position assurance receiving recess to the connector receiving passage, the locating member receiving recess is provided proximate the mating end, the arm receiving recesses have first projections and second projections which extend into the arm receiving recesses, the terminal position assurance device having first and second positions, in the first position terminal engagement surfaces of the second terminal engagement arms are positioned out of the connector receiving passage and in the second position the terminal engagement surfaces are positioned in the connector receiving passage and engage a back surface of a metallic outer shell of the connector assembly to prevent removal of the connector from the connector receiving passage and a terminal positioning surface of the first terminal engagement section engages the metallic outer shell of the connector assembly to further support and stabilize the connector assembly in the connector receiving passage.