Once you have lifted the panel up enough on the right side, you can insert your fingers or a spudger between the top and bottom panels.

Then gently move your fingers or spudger along the bottom and sides of the laptop, loosening the panel even more until it comes completely loose.

Once the top panel is completely loose lift the top panel up slightly so that the mousepad wire is visible underneath it. Unplug the mousepad wire from the bottom of the laptop.