Hilchos Maasei Hakarbanos 5:5

If a peace offering was slaughtered before the doors of the Heichal were opened, it is invalid. This is as per Leviticus 3:2: “at the door (literally, opening) of the Tent of Meeting,” meaning specifically when it is open. If the doors were merely closed (but not locked), it’s the same as if they were locked. The curtain over the entryway, however, does not invalidate an offering.

Hilchos Maasei Hakarbanos 5:6

The way that the blood of burnt offerings, guilt offerings and peace offerings – both communal offerings and those of private individuals – is sprinkled on the altar is always the same for all these offerings. The kohein takes the blood, which is in a bowl, and tosses it twice from the bowl – on the northeast and southwest corners of the altar, on the lower half of the altar. When sprinkling on the corners, he must have the intention that the blood will wrap around the corners like the Greek letter gamma (an “L” shape). This results in the blood from two sprinklings ending up on all four walls of the altar. This is done because when discussing burnt offerings and the peace offerings, the Torah says “around” (Leviticus 7:2, 9:12, 9:18). This rule likewise applies to guilt offerings. The rest of the blood is poured on the base of the altar on the south side.