The basic elements needed for forgiveness of sins depicted in Lev 4:32-35 and 5:5,6 are the sheep, laying their hand upon its head, slaughtering it, then sprinkling the blood and pouring it out, also removing the lamb/sheep's fat and burning it upon the alter. Also confession of the sin is required.
As Hebrews 10:1and 2 declare,"The old system in the law of Moses was only a shadow of the things to come, not the reality of the good things Christ has done for us. The sacrifices under the old system were repeated again and again, year after year, but they were never able to provide perfect cleansing for those who came to worship. If they could have provided perfect cleansing the sacrifices would have stopped, for the worshippers would have been purified once for all time, and their feelings of guilt would have disappeared.
Every aspect of these things points to a superior reality in Christ His body His blood Him bearing our sins upon His own body on the tree(1pet 2:24) I suppose the fat being burned up could possibly stand for God's judgement consuming the sin and of course our confession of sin is vital as we look in faith to Christ's sacrifice.
If we confess our sins He is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.(1Jn1:9) Oh that God would open our eyes to His great salvation!