Where in the world do you hook up the vacuum line that runs to the Auto Tranny "modulator valve" The connection runs from just under the oil cooler to ???

Also, it appears the details of getting rid of the "Rats Nest" have been lost. Can someone direct me to any site that might have that info in detail.

Really appreciate it!

777
1985 12A Auto
Ex owner of a '85 13B

PS First time ever posting. If I've screwed something up here please overlook.