Monneddy, welcome to Odyclub.
There is already a thread that discusses your question:
http://www.odyclub.com/forums/54-2011-odyssey/149218-covering-bars-after-removing-2nd-row-seat.html
Read the moderator's sticky thread about doing searches first so you can find an answer to your question faster while also avoid creating tons of new duplicate threads.
Honda Odyssey Forum : Odyssey Minivan Forums - Announcements in Forum : 2011 + Odyssey

There is already a thread that discusses your question:
http://www.odyclub.com/forums/54-2011-odyssey/149218-covering-bars-after-removing-2nd-row-seat.html
Read the moderator's sticky thread about doing searches first so you can find an answer to your question faster while also avoid creating tons of new duplicate threads.
Honda Odyssey Forum : Odyssey Minivan Forums - Announcements in Forum : 2011 + Odyssey