Backpanel connector

A backpanel connector comprises a first and a second housing, wherein said first housing is provided with a bottom with an opening and four side walls upstanding from the bottom and lying opposite each other two by two and wherein said second housing is provided with four side walls lying opposite each other two by two. The second housing is slidably mounted in the first housing in a z-direction perpendicular to the bottom of the first housing and has a receiving space for a connector plug. Two opposite side walls of the second housing each carry a first stop means and two corresponding side walls of the first housing each comprise a second stop means. The stop means engage each other in a rest position of the second housing directed away from the bottom of the first housing. A spring means loads the second housing in the direction of the rest position.