Plug-in connecting system comprising a plug-in connector, for electrically shielded storage of an igniter, and a plug, for plugging into the plug-in connector for electrical contacting of the igniter, wherein the plug-in connector comprises: an igniter; a plug-in connector central contact; a plug-in connector annular contact, which coaxially encloses the plug-in connector central contact, the plug-in connector annular contact and the plug-in connector central contact being electrically connected to the igniter for igniting the igniter; a plug-in connector housing which coaxially encloses the plug-in connector annular contact; an inner spring element, which is formed to spring the plug-in connector central contact into the plug-in connector housing; an outer spring element, which is formed to spring the plug-in connector annular contact into the plug-in connector housing; an inner plug-in connector insulator piece between the plug-in connector central contact and the plug-in connector annular contact; and an outer plug-in connector insulator piece between the plug-in connector annular contact and the plug-in connector housing; the plug-in connector central contact being shortcircuited with the plug-in connector annular contact and the plug-in connector annular contact being shortcircuited with the plug-in connector housing to prevent unintended ignition of the igniter in a storage state; and it being possible to eliminate the short circuit of the plug-in connector central contact with the plug-in connector, by springing the plug-in connector central contact into the plug-in connector housing, and the short circuit of the plug-in connector annular contact with the plug-in connector housing, by springing the plug-in connector annular contact into the plug-in connector housing, so as to use the igniter; wherein the plug comprises: a plug central contact; a plug annular contact which coaxially encloses the plug central contact; a plug housing which coaxially encloses the plug annular contact; an inner plug insulator piece between the plug central contact and the plug annular contact; and an outer plug insulator piece between the plug annular contact and the plug housing; the plug being formed in such a way that the plug-in connector central contact is sprung by the plug central contact, and the plug-in connector annular contact is sprung by the plug annular contact, into the plug-in connector housing when the plug is inserted into the plug-in connector; and the plug being connected to a coaxial ignition supply line for igniting the igniter. an igniter; a plug-in connector central contact; a plug-in connector annular contact, which coaxially encloses the plug-in connector central contact, the plug-in connector annular contact and the plug-in connector central contact being electrically connected to the igniter for igniting the igniter; a plug-in connector housing which coaxially encloses the plug-in connector annular contact; an inner spring element, which is formed to spring the plug-in connector central contact into the plug-in connector housing; an outer spring element, which is formed to spring the plug-in connector annular contact into the plug-in connector housing; an inner plug-in connector insulator piece between the plug-in connector central contact and the plug-in connector annular contact; and an outer plug-in connector insulator piece between the plug-in connector annular contact and the plug-in connector housing; the plug-in connector central contact being shortcircuited with the plug-in connector annular contact and the plug-in connector annular contact being shortcircuited with the plug-in connector housing to prevent unintended ignition of the igniter in a storage state; and it being possible to eliminate the short circuit of the plug-in connector central contact with the plug-in connector, by springing the plug-in connector central contact into the plug-in connector housing, and the short circuit of the plug-in connector annular contact with the plug-in connector housing, by springing the plug-in connector annular contact into the plug-in connector housing, so as to use the igniter; wherein the plug comprises: a plug central contact; a plug annular contact which coaxially encloses the plug central contact; a plug housing which coaxially encloses the plug annular contact; an inner plug insulator piece between the plug central contact and the plug annular contact; and an outer plug insulator piece between the plug annular contact and the plug housing; the plug being formed in such a way that the plug-in connector central contact is sprung by the plug central contact, and the plug-in connector annular contact is sprung by the plug annular contact, into the plug-in connector housing when the plug is inserted into the plug-in connector; and the plug being connected to a coaxial ignition supply line for igniting the igniter. a plug central contact; a plug annular contact which coaxially encloses the plug central contact; a plug housing which coaxially encloses the plug annular contact; an inner plug insulator piece between the plug central contact and the plug annular contact; and an outer plug insulator piece between the plug annular contact and the plug housing; the plug being formed in such a way that the plug-in connector central contact is sprung by the plug central contact, and the plug-in connector annular contact is sprung by the plug annular contact, into the plug-in connector housing when the plug is inserted into the plug-in connector; and the plug being connected to a coaxial ignition supply line for igniting the igniter.