always wear protactive goggles and gloves.
Slide the white seat rod into the rear hole of the track trough or groove, and bottom it out all the way into the hole.
Slide the seat & seat car assy onto the rod from the front end, all the way back until it stops.
Hold the rod firmly at it's mid point, and with your other hand press the front end of the rod downward towards the hole at the front end of the track groove, causing the rod to bow sharply.
Guide the end of the bowed rod into the hole at the end of the track groove, and then release the rod.
If the rod doesn't snap straight, then firmly press down on the bow until it seats into both holes fully, and reforms itself into a straight rod.
Restring the cord through the loop in the jam-cleat and tie a knot in the end. Your seat is now back on.