To connect to Turkey's proxy pool, use the proxy address on. Using Smartproxy residential IPs pool, you can pick from over 195 places and filter up to the city level while targeting Istanbul, Antalya, or other locations in Turkey.
Aside from the location, you can also choose between rotating and sticky sessions. If you want to go with rotating sessions and target Turkey locations, you have to pick a specific domain:port combination and use the specific endpoint of your chosen city or county (in this case, Turkey).
You can always find more detailed instructions on our documentation.