Connector assembly

The arrangement (10) has a base body (12) including a supply line (14) and an insertion opening (20) and connected to a fluid line. A connecting piece i.e. connection tube, is connected to another fluid line and plugged onto the supply line to form a tight connection with the supply line. A fixing element (22) is fixed in the opening along an axial direction of the supply line to secure the piece in a fitting position. A connection element (34) is movably mounted on the supply line in the axial direction and pre-stresses the fixing element in an axial position in a radial direction.