@grummy43: If you haven't registered them to your Samsung account, or paired them with your smartphone, then your options are limited, I'm afraid. All I can suggest is taking a look at the link below, and exploring the SmartThings Find features to see if this helps, as this does have an offline finding feature that might be of benefit to you.
https://www.samsung.com/us/support/answer/ANS00088182/
