Albert Barnes Commentary Leviticus 3:2

"And he shall lay his hand upon the head of his oblation, and kill it at the door of the tent of meeting: and Aaron`s sons the priests shall sprinkle the blood upon the altar round about." — Leviticus 3:2 (ASV)

Kill it at the door ... - See Leviticus 1:3. Tradition says that the peace-offerings might be killed in any part of the court.