2012 Toyota Sequoia Owners Manual - Page 73

1-3. Adjustable components (seats, mirrors, steering wheel) Third center seat belt The third center seat belt is a 3-point type restraint with 2 buckles. Both seat belt buckles must be correctly located and securely latched for proper operation. Make sure that the buckle is securely latched for ready use of the center seat belt. Matches the tab with the hooked end (tab "A") Matches the tab with the concaved end (tab "B")