Actually, installing the side art requires the bolts on one side to be removed at a time... then install the side art... then re-install that side and take out the other side... OR one could remove both monitors all together. I'd used this method to install side art on a DK cab and a Nintendo VS cab. I got cut up because taking the side bolts off the left side of the cab (facing from the front) is a major ---smurfette--- when you have large arms because that is the "bottom" of the Sanyo monitors and there isn't much room in there to maneuver let alone press the bolts that have been there for 25+ years out. There is no major damage, but I did end up with exactly 21 small nicks between both hands and arms.
Also, I played the lotto and won... by that, I mean that I chose to take off the easier (right) side first. The top monitor you can leave the top most bolt in, so it's no big deal, but the bottom monitor requires you to remove all the bolts from the side. What typically happens is the monitor drops back a little and the other sides mount holds things together. Well, as I removed the last bolt, not only did the monitor drop a little further than expected, the bracket on the side I was removing just dropped to the bottom of the cab!! The dumbass who mounted the monitors last had screwed in the screws that were supposed to hold the monitor on the bracket WITHOUT THE LARGER WASHER ... the problem is the screw heads are smaller than the damn holes in the bracket! Upon further inspection, the other side was the same EXCEPT FOR ONE... that ONE bolt was holding the monitor in place!! Had I decided to take off the OTHER side first, when I pulled that last bolt out, the whole freakin' monitor would have dropped out of the cab thereby ruining my day bigtime. I lucked out and learned a lesson. CHECK THE FREAKIN BOLTS ALWAYS... never take for granted that the guy prior to you had a clue.