between the door panel and the back side of the handle, you will notice a spring steel clip, kind of like a "U" that goes around the cylinder that is visible in that little space. Pry this out. When re-installing, replace this "U" on the handle before fitting back onto the regulator stud (that will come out from the door panel) and then "smack" it back onto the door. This makes sense when you see it, because the regulator portion that is attached to the door is pointy and will separate the U clip as you "smash" it back on. Best I can describe.