The speaker meshes are labelled L and R. When applying them, make sure they're on the correct side and that the colored, thicker liner is facing inward.

Remove the larger, clear liner from one of the speaker meshes and carefully put it into place on the frame.

Use the flat end of a spudger to firmly push down on the adhesive, securing it to the frame.

Leave the remaining colored liner in place for now—it will be removed in a later step.

Repeat the process to apply the other speaker mesh.