At this point there is still a strip of adhesive along the bottom of the display that will hold the display to the frame like a hinge. You can loosen this adhesive by working the display up and down a few times.
Lift the display up from the frame and remove it from the iMac.
It may be necessary to slowly lift from one side to peel against the remaining adhesive.
Be very careful handling the display—it's big, heavy, and made of glass.
After the adhesive is cut, it cannot be used to re-seal the display in place. Follow this guide to replace the adhesive strips that secure the display to the rear enclosure.
Remove the two 10 mm T10 Torx screws securing the right speaker to the rear enclosure.
Rubber washers keep the screws snug in the speaker even when loosened. You can use tweezers or a fingernail to remove the screws, or simply leave them with the speaker assembly.
Insert the tip of a spudger between the right speaker and the antenna cable, running it down the right side of the speaker to de-route the cable from its channel.
If the channel is not easily accessible, you can tip the speaker slightly forward (away from the rear case) to gain access to the antenna cable.