The doors are very big and, if open, you normally cant overlook them, because they are held in open position by gas compression spring.
Yet will remain in the closed but not latched position as the gas springs over centre.
Quite a few US registered machines have a microswitch fitted in the lower sill wired into the "EPU Door" circuit.
Surprising that it is not standard and the caption changed to read "BAG/EPU Door".