Cable clip question

The picture is from the Plymouth 1968 Shop Manual, which is identical to the picture in my 66' manual. My heater box has 2, not one hole and 2 separate flex tubes going to defrost vents not one splitting into 2 as in the book. The clip bracket on my box is to the right, not left as in the picture, and there is no rod running from left to right on the outside of the box.