Believe this is could be your man.

John Scott, Private, assigned from Conscript Bureau to Ordnance Department, at Shreveport, La. on September 28, 1863 for three years, born in Switzerland, Iowa, age 43, 5’ 9”, dark complexion, black eyes, dark hair, Tin Smith, discharged for disability at Shreveport, October 8, 1864

NARA
M320. Compiled service records of Confederate soldiers from Louisiana units, labeled with each soldier's name, rank, and unit, with links to revealing documents about each soldier.
State: Louisiana
Roll: 0410 P - Z