asalvo TRIO ROMA II Manuel D'instructions page 32

2. Disassembly of the seat
Release the belts under the seat unit by separating the Velcro straps
and separate the belts. Pull upwards the pins from both sides of
handle and release the seat fabric from the frame. Remove carefully
the seat fabric.
32
Place the front bumper to the armrests of stroller. Press firmly both
ends of bumper until you hear a click and they are fixed. Make sure
bumper is well fixed. To remove the front bumper, press the buttons at
both ends under the bumper and pull it upwards.
ATTENTION! Always use the safety belts in combination with the front
bumper.
SEAT UNIT (II)
FRONT BUMPER