I have a 1991 Series 4 Spider with a rocker panel cover that is unattached or unglued at the top edge. My question is how are these panels attached at the top. I`ve noticed a channel on the inside of the top edge and mine has remnants of black rubberized rtv left on the body. Is this all that`s used to stick this long panel on up top? I see the 4 plastic attach bottons underneath and the plastic rivets on the front and back edges....it`s just the top I`m concerned with. Thanks in advance for help.