Love The Drive Thunderbird Wind Deflector 2002 to 2005 - Manual (Page 2)

There are two thumb screws that attach
the bracket to the trim panel. Start by
loosening the thumb screws so there is
enough space to slide the brackets onto the
trim panel.
Remove one of the brackets by loosening the
large single thumb screw on one end. Then
slide the remaining bracket onto the trim
panel, close to the middle of the seat belt
cover.
Next slide the other bracket onto the trim
panel. Again about in the middle of the seat
belt cover, so the wind deflector panel can be
reattached to the bracket.
Next tighten the two thumb screws on each
side tightly. You might consider using a small
pair of pliers. This is a very tight space.
Your wind deflector can be left in place while raising and lowering the top. It can also be quickly
removed and put in the storage bag to store in the trunk.
The final step is to attach the snap hook
strap to the metal anchor at the bottom of
the passenger seat back.
Then attach the large thumb screws on each end
to the hole in the wind deflector to the bracket.
Now tighten all the small thumb screws.