Looking for male sibling born Aug/Sept of 1970

Hello, I am an black adoptee and I have been on here and I have found my birth mother/father, and I also found out that I also have a brother born in either Aug/Sept of 1970. The ** was in the 6th grade when this took place and I am searching for for him. I am not sure if he is aware of the situation at the time of adoption and I am not sure exactly what month. He was turned over to the Department of Social Services and I believe it was in South Carolina. Birth mother is from Columbia. Birth mother stayed with some family members to have the baby. If this sounds familiar, please respond.