en_tn/lev/08/22.md

the ram of consecration

The word "consecration" is an abstract noun. AT: "the ram for setting Aaron and his sons apart for service to God" (See: rc://en/ta/man/translate/figs-abstractnouns)

laid their hands on the head

This is a symbolic action that identifies Aaron and his sons with the animal they are offering. In this way the they are offering themselves to Yahweh through the animal. See how you translated this in Leviticus 1:4. (See: rc://en/ta/man/translate/translate-symaction)