Board to board connector assembly

A board to board connector assembly includes two connectors. A first connector includes a first insulation housing and first terminals. The first insulation housing includes a side wall. The side wall includes terminal slots. The first terminals are received in the terminal slots. The first terminal includes an interfering portion, a bending portion, and a contact portion. The bending portion elastically extends out of the terminal slot. The interfering portion, the bending portion, and the contact portion are not aligned on a straight line. A second connector includes a second insulation housing and second terminals. The second insulation housing includes a border wall and a tongue plate spaced from each other. The second terminal includes a contact portion exposed from a surface of the border wall or the tongue plate. The tongue plate or the border wall is disposed corresponding to the bending portion. While the two connectors are mated with each other, the tongue plate or the border wall forces the bending