How to use the shoulder strap of Buckingham camera bag?

The usage of Buckingham camera bag shoulder strap is as follows:

1. Pass the camera bag strap through the fuselage, then find the fixing ring on the strap and pass the strap through the fixing ring.

2. Loosen the lock of the strap slightly, put the strap in from the inside of the lock, and finally pull out the strap in the lock slightly and put it on the lower side of the lock.