Well then the OP may want ignore my prior comments. Maybe I just assumed that's what it is up there for? (Out of curiosity: What else would the band in that position be used for?).
Edited to add: I went and took a look at DSS's website, just to see if it showed what the band in Step #2 above (the one above the left D-ring) was used for. DSS does show a full rig set up like how I use mine, with the LP inflator hose under the band (so at least I know I did get the idea from a legitimate source vs. just making it up!).
This is a crop of the photo from the DSS home-page with my added notation:
I haven't had any problems venting with my inflator hose there, that I've noticed (this with two different wings). But maybe I'm just not experienced enough to know there is a problem, and/or anticipate a future one? Maybe I will try a bungie loop next time to compare the two. It's always fun to tweak things anyway
Blue Sparkle