hi i need help with this diagram i just need to know what this symbol is, its the picture at the bottom left corner that looks like an antenna.. sorry im not good with this stuff.. but im thinking thats its ground/earth?
this wiring diagram is for a audio spectrometer if that helps thanks!

That is a ground ( G ) In most cases it will be a black wire.

thanks for your input.. thats what i was thinking but these stupid instructions didnt come with any writing just that picture and wasnt sure if that was ground or not! =/ thanks alot!! for your help!!