Electrical connector with internal terminals having opposite sides located from connector internal sidewalls

An electrical connector, comprising:

• an insulation housing having a first fixing hole, the first fixing hole having a first inner sidewall and a second inner sidewall opposite to the first inner sidewall;
• and
• a first terminal comprising a contact portion, a fixed portion, and a connection portion, the contact portion and the connection portion extending from the fixed portion respectively and being exposed from the insulation housing, the fixed portion having a first side surface and a second side surface opposite to the first side surface in a first direction, the fixed portion having a first through hole, the fixed portion being fixed in the first fixing hole, the first through hole being located in the first fixing hole, the first side surface facing the first inner sidewall and being kept away from the first inner sidewall by a first distance, the second side surface facing the second inner sidewall and being kept away from the second inner sidewall by a second distance, the fixed portion comprising a first abutting portion and a main body connected to the first abutting portion, the first abutting portion protruding in a second direction perpendicular to the first direction and abutting against the first fixing hole, the first through hole being located at the first abutting portion, the main body extending perpendicular to the first direction and the second direction, a hole dimension of the first through hole in the second direction being larger than an outer dimension of the main body in the second direction;
• wherein the fixed portion, the first distance, and the second distance are dimensioned for adjustment to an impedance of the electrical connector.