After you have removed the motherboard, use a JIS #1 screwdriver to remove the four 10mm Screws holding in the cog shields.

Next, you want to pull apart the clips (two on each side) holding the top piece of the shield to the frame.

Then, once you have freed the cogs, you can lift the cog and remove it from the frame.

To completely remove the cog shield out of the way, carefully remove the black pin connectors from the slot in the shield.