I just installed a Pertronix ignitor in the distributor of my twin-cam 1975 Seven. It was a great improvement but now the tachometer won't work.
Obviously it is disconected, but I can't figure out how to reconnect it.

Pertronix installation instructions end by saying "reconnect the distributor ground wire if it has been disconected." Do they mean the wire that was connected to the old grommet? And, if so, where would one connect it?