Abh mod/Nacelle Control Room
The Nacelle Control Room was introduced in 0.5.3RC1 (originally 0.5.1). It was meant for a later version but was moved ahead due to request.
The nacelle control room is a buffing part. It requires the tech level specific control room. It requires batteries. It buffs the warp's efficiency. Currently this is not supported yet by the game. It is required to use Warp Coils.
Simply place it. No extra care is needed.