Yes you can, if you watch how much you open the back up. If I was planning on doing that I could have cut it open differently, but the only other idea I had was to put a usb-pcmcia adapter in there beneath my hub, to run my pcmcia phone card that work gives me. But, I found how to enable network access via my windows mobile phone so I don't need that now.
I put my coinage in the drink holders and empty it when I can hold drinks safely anymore. Your idea probably makes more sense there.