HONDA 2010 Odyssey - Manual (Page 183)

To install the plus-one seat: Install the seat cushion on the seat
bottom plate. To install the cushion,
hook the front of the cushion first,
then push down the rear until the
cushion is securely positioned.
To use the plus-one seat as a center
console, remove its seat cushion by
pulling up the seat cushion strap.
Then pivot the seat-back forward
until it is flat. Store the seat cushion
in the floor storage area.
Make sure the seats are securely
locked in place before driving. A seat
that is not locked in place could fly
around and cause injury in a sudden
stop or crash.
Hook the front of the seat to the
floor, then push down the back until
it locks. Make sure both the front
and back of the seat are securely
latched. Pull up the seat-back, and
adjust the seat-back angle to the
desired position while pulling the
seat-back strap on the outside of the
seat bottom.
Seats
180
SEAT-BACK STRAP
2010 Odyssey