Bring the push-pin tools` point-tip into the pin hole and push against the tool lightly. You can feel a step/click when done properly.
Keep the tool inserted & push the links unit out
Repeat step 1-2 on another pinhole, then remove the section successfully
Insert the pin and hold the unit position, then use the push-pin tool point to push in the head of the pin. Press lightly & push the unit to bond the links together.
Lightly twist to test the strap & make sure it embedded firmly