See also:

Unfastening the rear center seatbelt
Push the release button of the center seatbelt buckle (on the left-hand side) to unfasten the seatbelt. 1. Insert a key or other hard pointed object into the slot in the connector (buckle) ...

Example of the type of accident in which the SRS side airbag will most likely deploy.
A severe side impact near the front seat activates the SRS side airbag and SRS curtain airbag. ...

Rear center seatbelt on Outback
1) Center seatbelt tongue plate 2) Connector (tongue) 3) Connector (buckle) 4) Center seatbelt buckle WARNING Fastening the seatbelt with the webbing twisted can increase the risk or severity ...