Heddle in down position question

After warping last night I began my first weaving project tonight.  It was fairly straightforward except that I'm not sure about the heddle in the down posiiton.  Is there a particular place the heddle should be?  is it enough to just push it down with your hand to create the space?  There is that little notch at an angle --should the heddle rest there ? (it doesnt seem to quite reach there).  The resulting weave is looking ok, but the down position seems a bit awkward---maybe because my weave is not centered on the heddle