TT already pointed this out, but this is a good illustration of the logical inconsistency of the argument for 10 being batting around. In that first diagram, it looks like the next inning would start with Madrigal, not Nico. The inning doesn't end on the 9th batter, it ends after the 9th batter. So the line needs to be drawn to Nico, so the next inning would start with Nico. The dots are the players, and the arrows are the ABs, so Nico leads off, the AB taken points to Dansby who bats next, and so on and so forth. So when Madrigal ends this theoretical inning, logically, the AB should complete and the line drawn to Nico, would would start the next batting process in the next inning.
When 10 batters bat, it doesn't look like your second diagram, that diagram would need 2 arrows from Nico to Dansby, since Nico gets 2 ABs.