Honda 2006 Odyssey Owner's Manual page 164

Seats
Unhook the front of the seat from
the floor by pulling it back slightly,
then pivoting it upward.
Always remove an unsecured seat
from the vehicle before driving. A
seat that is not locked in place could
be thrown about and cause injury in
a sudden stop or crash.
160
To reinstall the seat, hook the front
of the seat to the floor, then push the
back into the locks. Make sure both
the front and the back of the seat are
securely latched before driving.
Installing the Stowable Second
Row Plus-One Seat
On EX and EX-L models
You can install the stowable plus-one
seat between the second row bucket
seats.