the natural hanging orientation of removable rear wall 90 when unlatched and with the truck box is in its down position obviously tilting the truck box up will cause removable rear wall 90 to swing out further as will be appreciated having the removable rear wall 90 hang in this open orientation will more easily accommodate opening by the operator since lifting or forcing is not necessarily required as best illustrated in fig3 first locking handle 104 and second locking handle 106 are attached on opposite ends of a rotatable bar 102 this rotatable bar 102 coupled with first locking handle 104 and second locking handle 106 allows for a removable rear wall 90 to be captured and held in a closed position when desired to further accommodate this feature a holding tab 108 is also attached to rotatable bar 102 as will be clearly appreciated by those skilled in the art first locking arm 104 and second locking arm 106 are rotatable between an open position shown in fig2 and a locking position shown in fig1 and 3 when in the locking position first locking handle 104 is received within first connection structure 94 a locking pin 114 can then be inserted to capture first locking handle in its locked position a similar relationship is achieved with second locking handle 106 second connection structure 96 and a second locking pin 116 when in this locked position.