The installation method of SLR shoulder strap is as follows:
1. Take one end of the strap out of the buckle and thread it into the buckle, making sure that the movable end is on the back of the buckle.
2. Insert the movable end into the small rectangular hole.
3. Then loosen the strap in the lock as shown in the figure, and then pass the movable end under the lock and tighten it.
4. The same is true for the other side. Make sure that the tape left at the end of the activity is long enough to ensure the safety of the SLR. After the strap is tied, try to pick it up and check whether it is firm.