iPhones can be easy to mix up! Here's a handy visual guide:
https://support.apple.com/en-us/HT201296
Have the serial number? Look it up by that here:
https://everymac.com/ultimate-mac-lookup/
Follow this easy guide from Microsoft:
https://support.microsoft.com/en-us/windows/connect-to-a-wi-fi-network-in-windows-10-1f881677-b569-0cd5-010d-e3cd3579d263