Quoted from HowardHurtz:
There is a hard to see third skinny post up near the casino hole. You could probably get away without doing that one but you might as well go all the way.
Hard to see, you're tellin' me. There's the two with the large rubber ring across them along the left side of the entrance but I even shined a flashlight back in there and I'll be darned if I can see a third one near the eject hole or elsewhere. Where exactly is it, do you have a photo? Thanks!