Robert E Lee 1, your local SCV Camp should be more than willing to assist you in discovering more about your Confederate Ancestor, especially if you are considering joining as a member and are trying to prove the connection to your ancestor who served in the Confederacy during the ACW. If your local Camp can not help you, then someone in the Brigade or the Division in which the camp is located can help. Membership in the SCV can be obtained through either lineal or collateral family lines and kinship to a veteran which must be documented genealogically.
You can do this by putting together a small family tree connecting you directly to the ancestor (you, Parents, Grandparents, Great Grandparents, etc... all the way to the ancestor under whose Confederate service record that you wish to join) and submitting with your application copies of census records, birth information, death records, etc... which connects you directly through the generations to that ancestor. A Lineal SCV membership shows that you directly descend from the Confederate Veteran by blood (Great Grandfather, Great Great Grandfather, 3rd Great Grandfather, etc...). A Collateral SCV Membership shows that you are related to the Confederate Veteran as a relative (Great Granduncle, Great Great Granduncle, 3rd Great Granduncle, etc...).
You will also need to attach some of your ancestor`s Confederate service records or pension records to prove that he honorably served in the Confederacy during the ACW. If you have specific information regarding your ancestors service during the war (campaigns, battles, skirmishes, fights, actions, etc...) you can summarize it and enclose that when you submit your application and packet for consideration to be accepted as a member.