Breaching Technologies Shotgun Hinge Breachign Door - Manual (Page 7)

Hinge Panels
With the door closed insert the hinge panels into their locations
(as seen below). Make sure that the hook on the door traps the
hinge. If there is resistance to loading the hinge panel reach
through the gap in the side of the door and pull it fully closed
(as seen in the picture below and to the right).
Jamb
Screw