Technical specifications   
11.11 Interfaces of the connection box standard and connection box advanced 
  Mobile Panels 2nd Generation 
252  Operating Instructions, 09/2018, A5E33876626-AC 
The figure below shows the wiring of the enabling button in the connection box standard and 
in the connection box advanced. 
 
FAQs Mobile Panels 2nd Generation 
(https://support.industry.siemens.com/cs/ww/en/ps/14746/faq
)