The light unplugs by the drivers side hinge. To remove the cover, there is a silver colored bolt on each hinge mounting bracket. Remove the two silver colored bolts, and then have someone help you move the cover about 3/4" toward the rear of the SSR, and then lift up and carry away.
I don't want to be critical but what you are calling the tonneau cover is really called the cargo cover. the cover that lifts up for the roof operation is the tonneau cover and the smaller cover is called the flipper door or toneau cover extention. I'm ready I have my flame suit on :lol