Please specify which category A/C topics should go in

[Duodec]

Last time I used body category for an A/C topic, but based on the category descriptions, there's no "right" place for A/C questions; could one of the categories be chosen and A/C added to the description?  It technically has connections to electrical, engine, body, and even interior but it is its own subsystem so it would be nice to keep it all in one place if possible.

Thanks