Yeah stupid question. I should have though to view it closer but the back of this particular preamp doesn’t have red/white but upon closer examination it’s just labeled L/R Thanks wish I could delete my stupid question.
https://tortugaaudio.com/products/active-preamps/ldr3000t-v25-tube-preamp/
https://tortugaaudio.com/products/active-preamps/ldr3000t-v25-tube-preamp/