The car body manufacturing process is an essential step in automotive production. It not only defines the structure and exterior of the car, but it must also meet all requirements of downstream processes. Therefore, one elementary goal is to ensure the geometric quality of the car body. The assembly of diverse free-formed metal components necessitates the utilization of a wide range of joining racks. Each of them is tailored to the distinctive form of the incoming components, the joining technologies employed and the prescribed joining sequence. Due to numerous influencing factors during the manufacturing process, the joining racks are designed to allow geometry adjustments at every contact point. Despite the extensive level of automation found in car body production, the process of achieving the desired geometry relies heavily on manual tasks. Since individual contact points within the joining rack are adjusted in iterative loops, the production line must be stopped every time. In an effort to improve the flexibility and automation level of the geometry processes within car body manufacturing, the mechanization of the adjustable contact points is imperative. To achieve this objective, it is necessary to first assess each contact point individually. This paper proposes a classification for contact points within joining racks to facilitate their assessment. After introducing five categories, its use is illustrated for a selected mechanization strategy. Further research is needed to determine the applicability of the classification to a full-size automotive series production line.