I hate to be the bearer of bad news but likely your uncle is in an umarked grave in Arkansas
This card is also his but note the difference in death date. I believe the first above to bethe more accurate as it comes from muster rolls while the second is scavenged from UDC information which is typically second hand from relations.
It appears to be the same person given the Ray county place of enlistment, rank, and Co. Commander name.