Thunderbird V6-232 3.8L SC (1989)
Child Seat Tether Attachment: Description and Operation
Some aftermarket child safety seats provide a tether strap which goes over the back of the vehicle seat and attaches to an anchorage in the floor or panel
behind the rear seat. (Ford's Tot-Guard Child Seat does not require a top tether strap). Three 9 mm (0.35-inch) holes in the package tray structure
(behind the rear seat) have been provided to attach the top tether, if required. You may use either attachment, or all if desired for up to three child safety
seats.
TETHER ATTACHMENT-PACKAGE TRAY
Vehicles equipped with a package tray (sill-below the rear window glass) have three 9 mm (0.35-inch) holes provided in the package tray sheet metal
structure for attaching the child seat tether. For easy identification, these holes are marked with the letter "T" stamped next to the hole.