There are 6 screws on both sides and 3 in the middle upper part. Remove all (6+6+3 )15 screws. (The bottom 2 screws do not need to be removed).

After the screws are removed the plastic frame can be separated from the main logic board holding frame. THERE'S ALSO SOME GLUE/FILLER BETWEEN THE 2 PARTS! So be mindful when separating the two pieces.