Try not to deform the shield too much. You'll need to reinstall it during reassembly.

Insert the pointed end of a spudger in one of the gaps on the top edge of the heatsink shield.

Gently pry up to release the clips securing the shield.

Repeat this process along the right edge.

Insert one arm of your tweezers under the bottom right edge of the heatsink shield.

Gently pry up to release the remaining clips.