Flip your logic board over to access the screws on its underside.

Use your T5 Torx driver to remove the four 3.9 mm screws securing the tension brackets to the logic board.

Gently hold the screws as you remove them, as the tension brackets may eject them.

During reassembly, loosely tighten these screws, then align the brackets and heatsink before fully tightening them in an X-pattern.