1. Open the folder C:\Program Files (x86)\MTA San Andreas 1.6\MTA\logs. Not there? Right-click your MTA shortcut, choose Open file location, then open MTA and logs.
2. Open console.log with Notepad. Your older game sessions are console.log.1 to console.log.5: right-click one, choose Open with, then Notepad.
3. Press Ctrl+A, then Ctrl+C, and paste it here with Ctrl+V. You can paste more logs after the first one.

Careful: MTA only keeps your last 6 game sessions, so copy the chats you need before they are gone.