You could also leave the Russound key pads in place and not use them or you could remove them and patch and paint the wall.  I bring this up because you have speaker wire running to a location where you may place a receiver and control each zone from that location, source, volume and each zone.  So you aren't tied to the Russound k/p's.
You have many option available...the great news is you have speakers wired in your home.