Auto Whiteberry Balcony Grow

I wanted to wait for roots to poke through the sides of the coco pellet. But they didn't come through. Instead one root showed up at the bottom of the coco pellet on day 4. Assuming this is the taproot and assuming the taproot growth should not be hindered in autoflowers, I should have transplanted to the final pot on day 4 or 5. Transplanted in the evening of day 6 into a 10L pot which got 2L of water on day 3. Watered with 100ml after transplanting.