An electrical connector assembly includes a female part (30) having a peripheral outer wall (2) and a plurality of inner walls (3) subdividing a cavity into a plurality of reception chambers (11). An electrical contact pin (4) is housed inside each reception chamber. A locking part (20) has an accommodation (1) with a same number of inner walls (12) as the female part (30), subdividing the interior of the accommodation into a number of insulated housing chambers (13) identical to the number of reception chambers (11). An electrical terminal (10) is housed inside each of the reception chambers. A connecting cover (40) with a through-hole is attached around each electrical terminal (10), each cover having an upper portion housed inside each housing chamber (13) and a lower portion extending beyond the end of the respective housing chamber when the locking part (20) is encased inside the female part (30).