Be very careful when lifting the cable where it connects to the board. Peel gently, and slide an opening pick under the cable if you're having trouble separating the adhesive.

Peel up the power button cable to fully separate it from the shell.

During reassembly, use thin double‑sided adhesive to secure the cable. If there's adhesive left and it's still sticky, you can reuse it. If you have a new cable, check it for pre‑installed adhesive and remove any liners.