Tach??

93cvlx, i hate that these cars don't have em, so i decided to buy a nice little tachometer. the instructions say it is designed to work with "DIS" engines.
(distributorless ignition system)but it just says, see wiring diagram. Well, i don't have the wiring diagram.
anyone know where to go with the green "tach signal" wire?:banghead:

ok, i read an older post with the same issue, it suggested to splice into the second wire from the front at the EDIS connection. no good. i have the power and ground at the battery and the tach signal wire at the suggested location. doesn't work.
help please