John Gill Commentary Leviticus 7:2

"In the place where they kill the burnt-offering shall they kill the trespass-offering; and the blood thereof shall he sprinkle upon the altar round about." — Leviticus 7:2 (ASV)

In the place where they kill the burnt offering shall they
kill the trespass [offering
See (Leviticus 1:11) :

and the blood thereof shall he sprinkle round about upon the altar ;
on the upper part of it. There was a scarlet thread that was drawn around the altar in the middle, the blood of some of the sacrifices was sprinkled below it; and some above it, as was the blood of the trespass offering.