Chf is moving the anti sway bar, front and rear, to the tighter setting by moving the connecting rod to the upper hole, thus stiffening the anti sway bar. The anti sway bar helps the tipping of the RV from side to side. Keeps the RV more stabile from side to side movements.
A steering stabilizer connects from some rigid part of the front end to the tie rod, which is a long bar that connects to both sides of the front end and keeps both wheels moving in unison. The stabilizer is basically a shock and spring, the spring helps to keep the steering centered and brings the steering back to center quicker after making turns. The shock helps to dampen the steering inputs and feedback from deformations in the road.