FORD 2003 Windstar v.1 - Manual (Page 91)

Push control to lower head restraint.
Seat mounted cup holders (if equipped)
Your vehicle may be equipped with cupholders mounted on the outboard
sides of the second row seat(s). The cupholder is designed to detach
from the seat when subjected to a heavy load. The cupholder can be
reinstalled by lining up the arms with the side shield holes and pushing
toward the seat.
Seating and Safety Restraints
91