An electrical connector backshell adapter for terminating sheathed electrical cables, the electrical connector backshell adapter having a housing having a first and at least a second port, the electrical connector backshell adapter further having a cable sheath termination nipple having a proximal end, the cable sheath termination nipple overlying the housing's first port, the cable sheath termination nipple's proximal end being fixedly attached to or formed wholly with the housing; the electrical connector backshell adapter further having a seam extending through the housing, the seam further extending through the cable sheath termination nipple, the seam dividing the housing into first and second housing sections, the seam further dividing the cable sheath termination nipple into first and second nipple sections, and the electrical connector backshell adapter further having a hinge connected operatively to the housing's first and second housing sections for motions of the first and second housing sections between opened and closed positions.