Graco Dream Suite Owner's Manual page 11

Head End
Groove
SNAP!
5. Flip bassinet/changer over so side
with the canopy is facing up.
CHECK tube with grooves is
inserted exactly as shown.
6. Insert tube with grooves into
the top channel of leg hub in
head end of bassinet/changer as
shown.
The metal button should be facing
out when snapped in place as
shown.