My 09 EX have not acces from bottom of rubber mat, i can not lift up smal part because is integrated part of piece with USB and other connectors.
My recommendation:
1.remove rubber mat from bottom armrest
2. unscrew 2 screws from bottom plastic piece with USB and other 2connectors
3. pry up centre console - where are drink holders
4.unplug connectors - USB and other 2 connectors
5.lift up full piece of plastic where are USB and other 2connectors
You can get acces to adjustment nut, little place with bad acces - thank you japanese engeneers
spanner 12 to adjust