You already answered your own question in the first post.
If we have the tvg-id ABC7WLSTV.us for chicago, then you put that tvg-id to that channel. Sounds logical, doesn't it?
Use the channel finder on the website for looking up tvg-ids if you do not know how to search for them in the editor.
Read texts on the website! Read the FAQ! Watch the tutorial videos and USE YOUR BRAIN!
https://www.iptv-epg.com/available-channels?term=abc
If we have the tvg-id ABC7WLSTV.us for chicago, then you put that tvg-id to that channel. Sounds logical, doesn't it?
Use the channel finder on the website for looking up tvg-ids if you do not know how to search for them in the editor.
Read texts on the website! Read the FAQ! Watch the tutorial videos and USE YOUR BRAIN!
https://www.iptv-epg.com/available-channels?term=abc