A connector (100) is disclosed that includes a housing (2) having a length, a width, a first end wall (15), a second end wall (19), and a plurality of first (17) and second (18) grooves disposed on upper-portion main surface and bottom-portion main surface of a base (2). The grooves receive pluralities of first (70) and second (71) insulated conductors, respectively. A plurality of terminals (16) make contact with the first and second insulated conductors so that the first insulated conductors and the second insulated conductors are electrically connected to each other.