As of 2052, the bakery is owned by the Sicilian Mafia. The owners use it as a transit point for Zyme distribution for the Champs-Élysées. To protect their business they set up an extensive security system that triggers an alarm if the window breaks.
Renault asks JC Denton to break in here and steal the Zyme for him. To get inside, JC can either pick the door lock, or break the window glass. In the latter case an alarm will sound, making nearby police or MJ12 troopers rush inside and investigate.