Link? Google doesn't turn up too much except an old bug report. I switch haphazardly between terminator (sitting at my desk) and tmux (sshing in); I'd love to unify it.
https://code.launchpad.net/~andfagiani/terminator/tmux
And here's the discussion of it:
https://bugs.launchpad.net/terminator/+bug/1301605
You can see in comment 18 how to use it.