I have the same bed hook style on my 54 . there is also another type of bed hooks that are in the middle of the bed.
bed hook 1
http://s20.photobucket.com/user/espinoza720/media/IMG_20130407_174849_zpsbb4d9035.jpg.html
bed hook 2
http://s20.photobucket.com/user/espinoza720/media/IMG_20130407_174903_zps8c5fe8b6.jpg.html