Old terminals 1 & 2 are closed and not in use anymore. I guess you have to meet your man OUTSIDE the terminal. There’s no way you can get inside them from the new terminal.
Ragarding signposting, I’m not that sure old terminal 2 is still shown in the singns. As far as I remember they only show the way to the new one. Are you sure he meant OLD T2? If that’s the case, you’ll probably need to park as shown in this video, somewhere at min 1:34.
Remember old T2 is the smaller building to the right of T1 and closer to the control tower, hidden behind the trees in the video.