The handle on the back of the driver's seat is unseated on one side, making it pretty useless. It looks like the previous owner tried to repair it by putting a second screw in beside the original, but it obviously didn't hold.

If the screws aren't holding, I'm wondering what the internal composition of the seats is - could I use some sort of anchor?

Otherwise, does anyone have any idea how much purchase there is inside these seats? How large of a screw can I use? (Diameter and/or length-wise)

If I can't fix it, I'll just remove it, but that will leave two holes in the back of my seat, so it's less desirable.

Thanks!