Howdy!!
From the picture and instructions, where would you probe your one hit? What does "behind" mean to you? You going to probe the yellow or red circle??
I'd just have you position the probe in the hole and do a read point, but behind, in general, is relative to the front of the machine, so it would be the yellow.
I'd just have you position the probe in the hole and do a read point, but behind, in general, is relative to the front of the machine, so it would be the yellow.