MS BOSTON 1 Manuel D'instructions page 32

ISOFIX and Top tether
Pull out the child car seat's top ether to the longest status
Attach the top-tether hook to the anchorage point recommended in
your vehicle's instruction manual
Tighten the top tether,until the belt tension indicator turns green
CAUTION! check that you are not using luggage hooks instead of the
top-tether anchorage points
Installed inside the car
06