an insulative housing having

a lateral segment having

a top;

a bottom;

a front end;

a rear end;

a row of through holes defined through the lateral segment;

a row of positioning passageways, the positioning passageways corresponding respectively to the through holes, defined through the lateral segment and communicating respectively with the through holes;

a row of limiting blocks, the limiting blocks corresponding respectively to the positioning passageways, formed on the top of the lateral segment and crossing respectively over the positioning passageways;

an upright segment formed on and protruding uprightly from the top of the lateral segment near the front end and having a row of open slots, the open slots defined through the upright segment, communicating respectively with the positioning passageways and each open slot having

two opposite sides; and

an open bottom communicating with the open slot; and

a plurality of terminals mounted on the insulative housing, corresponding respectively to the through holes, positioning passageways and open slots and having a plurality of terminals, each terminal having

a circular cross section;

a mounting section being L-shaped, mounted in the lateral segment of the insulative housing and having

a vertical portion mounted through a corresponding through hole of the lateral segment of the insulative housing; and

a level portion formed on and protruding substantially perpendicularly from the vertical portion, mounted in a corresponding positioning passageway and blocked by the limiting block over the corresponding positioning passageway;

a resilient section being U-shaped, formed on and protruding from the level portion of the mounting section, mounted through the open bottom of a corresponding open slot and selectively compressed; and

a contacting section formed on and protruding from the resilient section, mounted in and extending forwards from the corresponding open slot.