A receptacle connector system comprising a receptacle connector comprising: a housing including a mating end and a cable end and defining a cavity therebetween, the housing including a top wall, a bottom wall, and first and second side walls (206, 208) that extend between and connect the top wall and the bottom wall, the housing including a first hold-down rib in a first corner region of the cavity defined by the top wall and the first side wall, and a second hold-down rib in a second corner region of the cavity defined by the top wall and the second side wall; and a terminal held in the cavity of the housing, the terminal having a contact segment that includes a floor and first and second rolled walls (218, 220) that extend from the floor, the floor engaging the bottom wall of the housing, the contact segment defining a receptacle configured to receive a mating tab contact therein through the mating end of the housing, wherein the first hold-down rib is configured to engage an outer surface of the first rolled wall of the terminal and the second hold-down rib is configured to engage an outer surface of the second rolled wall of the terminal to limit float of the terminal within the cavity, characterised in that: (i) the receptacle connector system comprises a relatively smaller said terminal and a relatively larger said terminal either of which can be selectively held in the cavity; (ii) intermediate segments (506, 508) of the rolled walls (218, 220) of the smaller terminal and the larger terminal have similar positions and are configured to be disposed proximate to the hold-down ribs (302, 304); and (iii) distal ends (502, 504) of the rolled walls (218, 220) of the smaller terminal are located more proximate to the floor than a proximity of the distal ends (502, 504) of the rolled walls (218, 220) of the larger terminal to the floor, whereby the housing 106 is configured to limit vertical float of whichever of the smaller terminal and the larger terminal is held in the cavity without modification of the housing. a housing including a mating end and a cable end and defining a cavity therebetween, the housing including a top wall, a bottom wall, and first and second side walls (206, 208) that extend between and connect the top wall and the bottom wall, the housing including a first hold-down rib in a first corner region of the cavity defined by the top wall and the first side wall, and a second hold-down rib in a second corner region of the cavity defined by the top wall and the second side wall; and a terminal held in the cavity of the housing, the terminal having a contact segment that includes a floor and first and second rolled walls (218, 220) that extend from the floor, the floor engaging the bottom wall of the housing, the contact segment defining a receptacle configured to receive a mating tab contact therein through the mating end of the housing, wherein the first hold-down rib is configured to engage an outer surface of the first rolled wall of the terminal and the second hold-down rib is configured to engage an outer surface of the second rolled wall of the terminal to limit float of the terminal within the cavity, characterised in that: (i) the receptacle connector system comprises a relatively smaller said terminal and a relatively larger said terminal either of which can be selectively held in the cavity; (ii) intermediate segments (506, 508) of the rolled walls (218, 220) of the smaller terminal and the larger terminal have similar positions and are configured to be disposed proximate to the hold-down ribs (302, 304); and (iii) distal ends (502, 504) of the rolled walls (218, 220) of the smaller terminal are located more proximate to the floor than a proximity of the distal ends (502, 504) of the rolled walls (218, 220) of the larger terminal to the floor, (i) the receptacle connector system comprises a relatively smaller said terminal and a relatively larger said terminal either of which can be selectively held in the cavity; (ii) intermediate segments (506, 508) of the rolled walls (218, 220) of the smaller terminal and the larger terminal have similar positions and are configured to be disposed proximate to the hold-down ribs (302, 304); and (iii) distal ends (502, 504) of the rolled walls (218, 220) of the smaller terminal are located more proximate to the floor than a proximity of the distal ends (502, 504) of the rolled walls (218, 220) of the larger terminal to the floor, whereby the housing 106 is configured to limit vertical float of whichever of the smaller terminal and the larger terminal is held in the cavity without modification of the housing.