I just wanted to share what I did on my ArcadePC to add jukebox controls. I didn't have any room to mount buttons, so I opted for a USB keypad. The one I use is wired, but I see now they have wireless versions for only $30. Here's a picture of the original wireless keypad and then a picture of my finished jukebox conversion (using my wired pad). It's mounted at the bottom right of the bezel using velcro. It's been working for years.