Attachment system for attachment of a storage container in a motor vehicle

The system has a first motor vehicle seat provided with a first seat frame. The seat frame is provided with a recess. A positioning element (2) is provided with a first fastening element (6) i.e. engagement hook, for fastening the positioning element to a storage box. A second fastening element (12) of the positioning element is engaged into the recess of the seat frame, for fastening the positioning element to the seat frame. A third fastening element fastens the positioning element to a second seat frame of a second motor vehicle seat of the motor vehicle. Tabs (10) are arranged at bars (8).