I'm getting ready to install the storage armrest on a 2010 LX. After taking off the seat cover, the mounting bracket for the armrest is hidden under a plastic cover. However, once the metal bracket is uncovered, there's a rubber block attached inside, which is roughly the size of the bracket itself. The instructions don't mention anything about this block -- does it need to be removed? Leaving the block intact would make a tight fit for the mounting hardware. Any suggestions? Thanks in advance.