On the two end of the Apple Watch connection strap, you can see a card-type Spring button for securing the strap.
When we press the card port button at one end of the strap to replace the strap, we can take out the strap.
After removing the strap, observe the head of the strap and a spring button for fixing the table and strap.
The strap to be replaced is then placed in the opposite direction from the removed
In the same way, remove the strap you want to replace, and replace it with a new strap.