Hi all, we were in the tub scrubbing today and for the first time I noticed two areas that look like the holes the jets are in but they just have a straight tube coming out with no cover. One is in the bottom side and one is up higher on the wall of the tub? What are they and should they be covered? I tried to look at pictures but I cant tell from the Sundance website. It is an 04 Optima if that helps. :-?