Does anybody know where these plug into?

A "poor" pdf in this thread but its better than nothing.
https://www.forabodiesonly.com/mopar/threads/ignition-help-needed-stumped.499412/
Some photos and manual screen shots here
https://www.forabodiesonly.com/mopa...s-to-start-when-you-let-up-on-the-key.544566/