At this point my auto drank a shit load of water. I would mix a gallon, water let it soak in a bit. Water more and continue til runoff (as whitebb) mentions. I was able to go a full 3 days or more afterwards, but my pots were really light then. From your pictures, it looks like you are watering just around the base of the plant. If your not, you want the roots to completely fill the pot as they search for water, so completely soak when you water. I'm using 3g fabric pots, so not sure how well the pots you are using drain. Now that mine are late in flowering, they go considerably longer without watering.
For me I was concerned at 3 days, because I was feeding with every watering. Figured if I watered more it would be too much. Anyway, they're looking great, so you're doing just fine In my complete novice opinion, lol.
My one auto should yield 2-2.5 oz dry IMO (and I had to go from 18/6 to 12/12 7 weeks in because of another auto not flowing issue
). If it was me, at this point, I would just pull your main cola off to the side and tie off or selectively do the same with a few other branches just to get light down to the other branches. It seemed to work for me anyway and I hadn't done too much until it started flowering too.