i need some help with my aftermarket stereo

[BLUE X]

can any one help connect my stereo. i have the wire harness but im kind of confuse. do i connect both of the black wires together or th the chasis of the car i dont get it.

 

[LOW AND BLOWN]

Together.:top:

 

[BLUE X]

just black and black no chasis

 

[LOW AND BLOWN]

Yep the black on the trucks harness will eventually led th chasis ground,so just connect black to black.

 

[BLUE X]

thanks a lot man