In the Starship Launch Animation, first, a crewed Starship launches and reaches orbit. Then the fuel tanker Starship rendezvous with the former and docks like this for orbital re-fuelling.
It can be seen that the heat shields (windward side) of the ships face opposite sides. This can be inferred from the fact the two ships have slight variations near the landing legs and the backward actuator (or body flap). And also note the difference in reflection of light from the sun by the surfaces of two Starships.
Another view of the two ships in docked mode:
So, Why do two Starships dock in such a manner their heat shields face opposite sides? Is there any specific reason or something not to care much in an animation? I think there must be some kind of scientific reason for this type of docking.