Plug connector of an electrical plug connection and set comprising a plug connector and functional element

A plug connector of an electrical plug connection, which has the plug connector and a mating connector assigned to the plug connector as a counterpart and into which the plug connector is adapted to be plugged in a plug-in direction, the plug connector comprising:

• a housing;
• and
• a plurality of electrical plug contacts that are arranged at least partially in the housing and are arranged side by side in a series direction,
• wherein a first housing wall of the housing, which is arranged parallel to a plane spanned by the plug-in direction and the series direction, adjoins a second housing wall of the housing,
• wherein a normal of the second housing wall points approximately in the plug-in direction and is arranged at an angle to the first housing wall,
• wherein a third housing wall of the housing adjoins the second housing wall, the third housing wall being arranged at an angle to the second housing wall so that the second housing wall is arranged between the first and third housing wall,
• wherein the first housing wall has at least one first fastening element for fastening a functional element to the housing, and
• wherein at least one of the second housing wall and the third housing wall has at least one second fastening element for fastening a functional element to the housing.