Combination of connector assembly and two printed circuit boards

A combination of a connector assembly and two printed circuit boards, comprising:

• a first printed circuit board having a guiding gap formed in one edge thereof and a second printed circuit board;
• a receptacle connector including:
• a receptacle insulating housing disposed on the first printed circuit board and spanning the guiding gap, the receptacle insulating housing having a plurality of assisting channels formed in a rear portion thereof, the assisting channels penetrating through a top surface, a rear surface and a bottom surface of the receptacle insulating housing and being in open communication with the guiding gap of the first printed circuit board, and
• a plurality of receptacle terminals disposed in the receptacle insulating housing and electrically connected with the first printed circuit board, each of the receptacle terminals having a pair of clamping arms facing each other, and a pair of face-to-face contact portions formed at corresponding ends of the clamping arms, said clamping arms being inclined toward each other and extending into a corresponding assisting channel;
• and
• a plug connector mated with the receptacle connector and including:
• a plug insulating housing disposed on the second printed circuit board, and
• a plurality of plug terminals disposed in the plug insulating housing and electrically connected with the second printed circuit board, each of the plug terminals having a contact arm extending outwardly from the plug insulating housing and beyond one edge of the second printed circuit board for passing through the guiding gap to enter into the corresponding assisting channel and being electrically clamped by the contact portions of the corresponding receptacle terminal.