Sorry, I missed this post. Sounds strange. Theoretically, I guess a set of plugs could could be forgotten or placed wrong. Another, and more likely, possibility is that somebody forgot to drill holes in the foot pads. Can you probe with a needle if there are adjacent holes hidden under the pad? If I remember correctly there should be three positions for the back strap. At least was the case on the iS76 08 I had. My guess is that you should find another hole in front ofte two rear holes.
Can you check?