To avoid straining the display cables, don't open the display all the way yet.

Open the display at max. to an 45° angle, and use tweezers to peel off the adhesive between the display and the Force Touch gasket.

Thread the adhesive around and behind the display cables to get it off completely. Since the adhesive needs to be replaced anyway, you can cut it if that makes removal easier for you.

Make sure to return to this point during the reassembly of your watch and then continue with the Resealing Procedure.