back cover installtion manual

how to put back cover on i guess there was a problem with old design that worked flawless for 20years

is thereva class i csan takevto lesrnn how tyo don it ,oh excuse nmy keyboard i stopped goimng back and smd fixing like 4 yeasrtw ago its old its a macbook pro 2021 m1 igot it nov 21 and it strted acting up aplil 2022 i guess i shoukld nhave gottonthe nexy level but i oinkly had $2600and it was $2568