Band-to-capsule connection techniques and assembly methods for a wrist-wearable device

A band portion of a wrist-wearable device, comprising:

• a flexible printed circuit (FPC) board;
• a mounting plate;
• a structural component coupled to a capsule portion of the wrist-wearable device;
• one or more electromyography sensors, wherein the one or more electromyography sensors each include one or more electrodes configured to couple to the FPC board;
• and
• a strain relief layer coupled to the FPC board, wherein:
• a first portion of the strain relief layer wraps around at least the mounting plate such that the first portion of the strain relief layer is folded back onto and coupled to a second portion of the strain relief layer to secure the mounting plate within the strain relief layer;
• and
• the mounting plate includes at least one recess for engaging the mounting plate with a structural component of the band portion, the mounting plate configured to couple the strain relief layer to the structural component.