Question of the day. Why put the build sheet behind or below the seat?

[aerotruk63]

The seat would have had to been in the beginning stages of being upholstered when the build sheet was placed there.
The truck would have been assembled before the seat was even installed. I would think you would have wanted the seat to be one of the last items installed in the interior.
That Trim Shop copy must have been one of many printed copy's as the truck was progressing down the assembly line. Each station having it's own, to prepare for that truck, that was approaching.

Sorry for bringing it up, just seems odd to think of it's location and the process on the assembly line..