Does anyone know how the panel on the seat back is held in? I want to remove it without breaking it or anything in the seat.

Thank you.

Perhaps checking with your local upholstery shop would get you the information you need. The entire seat back cover is usually stretched over the padding and frame and zippered, Velcroed, clipped with an edge hook, or hog ringed in place. If there is an additional trim panel, I'm not certain how it might be attached.

If your seats have the airbags, then the back panel lifts up and out.