I do not see the lifting bar. It will be a bar about a ft long that goes in through the larger hole in the bracket and has a small pin on one end that goes into the smaller hole. That bar is used to lift the bracket into the loaded position.
Before you go much further consider the tongue jack as it will have to be moved to clear the driver side bar.
That is a weight distributing system ONLY. It has no sway control function.
The trailer looks nice enough to warrant a new system with sway control.
WBCCI 12156 AIR 3144 WACHUNG TAC NJ6
2004 Excursion 4x4
1991 34 ft. Excella +220,000 miles, new laminated flooring, new upholstery, new 3200 lbs axles