The upper A/C line, the one covered in foam, travels across the top of the housing. It attaches to the housing via a bracket, which acts as one of its mounts.

To start the removal of the housing you'll need to detach the A/C line from the bracket. It's held in place with a 10mm bolt and nut.

Place a 10mm socket on the nut side, and a 10mm box end wrench on the bolt side, and back out the bolt.