The sin-offerings and others needs to be slaughtered in the northern part of the Temple courtyard -- as derived by biblical verses. Plus, the collecting of the blood, the sprinkling of the blood, and the placement of the person collecting the blood. Also, the way "he shall slaughter it" comes to exclude. And the laying on of hands comes into play as a possible exclusion, rather than it being about the northern location for the slaughtering. With a deep dive as to whether the person handling the offering needs to stand in the north too.