iwc 3713 Mode D'emploi page 26

Attaching the bracelet
Attach the component parts of the bracelet link to the
connection point and push the pivot pin into the brace-
let from the side opposite the marking (1), until the pivot
pin projects by about 3 mm.
Using the special tool provided, now press the securing
pin downwards (2) and, at the same time, slide the
pivot pin back into the bracelet until it lies flush (3). The
securing pin must be brought up flush with the upper
edge of the securing link. Please be sure to check the
correct seating of the pivot pin.