Trimmed ends of top and bottom bracket to proper length for the seat. Rounded off the ends of both brackets. Drilled pilot holes thru both brackets. Clamped top bracket to the seat back and drilled it to the seat back. Deburred all holes. Cut three lengths of hinges for the bottom of the seat back and the seat back brace. Drilled pilot holes thru all hinges. Clamped bottom bracket and hinge to the seat back and drilled them to the seat back. Clamped hinge to the seat back brace and drilled it to the brace. Attached the other half of the hinge to the brace and hinge. Clamped everything into position on the seat back and drilled the hinge to the seat back.
