The perimeter adhesive is difficult to align and can't be adjusted after it adheres. Work slowly and make sure the edges stay lined up with the frame as you go.

Peel the bottom edge of the rear cover perimeter adhesive from its liner. Leave the rest of the liner in place to protect it while you lay the adhesive down.

Hold the large liner out of the way and align the bottom edge of the adhesive with the frame.

Press the bottom edge of the adhesive into place.