xyzzy, T6-7-8 are essentially the same building and thus no tunnel is required.

Ted uses gate 71A and maybe B, to walk over to the CO gates, simply turn left and walk to the end of the hallway and then make another left. Follow the signs to the T6 and you should be there in maybe 5-6 mins(The Walkway between T-7 and T-6 has some great views of the CO AC and the UA AC).

Map of T-6/7/8


Dan