What contains additional information, including the location of the manufactured head of the fastener on the assembly?

The correct choice is the NAS symbol. The NAS (National Aerospace Standards) symbols play a critical role in aerospace documentation as they convey specific information related to fasteners and other components. The NAS symbol can indicate multiple aspects of a fastener including its type, dimensions, strength grade, and crucially, the location of the manufactured head of the fastener within the assembly. This information is vital for ensuring that fasteners are installed correctly and function as intended within the aerospace structure.

In contrast, other options do not contain the specific detailed information regarding the fastener location. Detail sections typically provide drawings and technical specifications, assembly instructions guide how to put together components, and parts lists enumerate the components required for the assembly but do not specify the positioning of fasteners in relation to their heads. Therefore, the NAS symbol stands out as the source of this particular information in the context of aerospace assembly mechanics.