I applied the instruction sticker on the control panel backer and the coin sticker on the front of the arcade. I bought them on ebay. The coin sticker is centered. I'm not sure if that's the right position but I like it that way. I also didn't bother to research the proper location for the instruction sticker and it still looks pretty good.
I bought the stickers and the sideart on ebay. I positioned the sideart 2 3/4 inches from the top of the cabinet and 2 3/4 inches from the rear of the cabinet. I taped it into place with blue tape.
I then removed the blue tape from the top of the sticker, removed the backing from the top of the sticker only, and smoothed the top of sideart on to the cabinet.
Then I removed the rest of the tape and the rest of the sideart backing. I smoothed it out slowly to make sure there were no bubbles. I didn't come up with this method. I saw it on YouTube.