Putting my pig back together. Installing the rear cargo area skins, I noticed a set of wires on the passenger side that look like they hook up to a speaker? No wires on the drivers side. Did the stock FJ55 come with the option of rear speakers for the stock radio? I also have an extra set of the rear crago skins that I picked up a few years back that have a speaker on each side. Looking at the way the speakers are installed, it sure looks like they are stock? So, a stock 55 with four speakers? Possible?