Hallo Markus,
Leider bin ich mit Deutsch nicht vertraut und werde auf Englisch antworten.
The rtw_solver.h and rtw_continuous.h files in the attached 'C-Code.zip' file containing the generated code are used for the execution-spec of the model and contain all related information such as the stop-time, sample-time etc. For more information, please refer the following documentation: www.mathworks.com/help/releases/R2024a/rtw/ug/build-process-file-dependencies.html
The variables corresponding to the input/outputs can be easily found using highlighting feature on the generated code. Please refer the following documentation for more information: www.mathworks.com/help/releases/R2024a/ecoder/ref/modeltocode.html