I was trouble shooting my FJ-60 rear window washer and found a leak in the gromet that joins the tubing from the right rear of the cargo area under the headliner thru the gromet into the right rear cargo window. I tried to pull the seam cover and two plactic strips that provide a seam for the headliner to the rear posts. My question is the headliner seems to have a metal piece that goes from side to side and I can't see how it's attached. How can I pull that portion of the headliner back to access the tubing and the leak? Many thanks in advance.