Locate the damaged cord lock and take note of:

Type - The style of of cord lock and how many holes it has

Drawcord - How the drawcord threads through the cord lock and how the drawcord ends (end cap, knot, stitching)

Other Pieces - If the cord lock and drawcord are used in conjunction with any other pieces such as a rubber pull tab or plastic disc

If the cord lock is missing and it isn't clear how it was originally placed, see Step 7 for tips.

Check the other cord locks along that same drawcord. It's best practice to replace all damaged cord locks at the same time.