MS QUICK BY Manual De Uso página 16

Assembly instructions
To attach the front bumping bar.
attach the bumping bar plastic on the handle tube on each side.
Make sure it is assembled well.
Using the seat recline feature
To select a reclined position, pull the buckle rearward. Let go when you
have reached the required position. To pull the webbing with one hand,
let go when you have a upright position.