Card edge connector and card edge connector assembly

A card edge connector assembly, comprising:

• a first insulator having a plug space, a plurality of first terminal holes located above the plug space, and a plurality of second terminal holes located below the plug space;
• a second insulator having a front end face and a back end face, the front end face abutting against the first insulator and having a plurality of first slotted holes interconnecting with the first terminal holes and a plurality of second slotted holes interconnecting with the second terminal holes, and the back end face having a slot;
• a plurality of first terminals disposed within the first terminal holes and the first slotted holes;
• a plurality of second terminals disposed within the second terminal holes and the second slotted holes, wherein the first terminals and the second terminals comprise a plurality of front contact portions and a plurality of back contact portions, the front contact portions reach to the plug space via the first terminal holes and the second terminal holes, and the back contact portions reach to the slot via the first slotted holes and the second slotted holes;
• a circuit transferring board being inserted into the slot of the second insulator, the circuit transferring board comprising a plurality of first conductive portions, second conductive portions, and welding portions, wherein the back contact portions are electrically coupled to the first conductive portions and the second conductive portions;
• a flexible flat cable comprising a plurality of conductors which are welded to the welding portions of the circuit transferring board;
• and
• a circuit board having a card edge portion, the card edge portion having a upper side and a lower side with a plurality of conductive portions, the card edge portion being inserted into the plug space of the first insulator, the front contact portions of the first terminals electrically contacting the conductive portions located on the upper side of the card edge portion, and the front contact portions of the second terminals electrically contacting the conductive portions located on the lower side of the card edge portion.