The safety belt must be extended exclusively in its intended area, as well as check the strength of fastening, but if it sags, then tighten to the desired position.
On some models of the belts, special locks are installed, which are very useful. Correct use, which is scheduled in the instructions. If, with complete stretching over the entire length of the belt, returning, it clicks, then it means it, fastenes down on its own. If the belt itself is not fastened, it is required to use the connecting locks.
