Wire up 1994 5.2mag mpfi in older car

It is a 1998 dodge dakota. I can't find a wire diagram for the ecm I had it running with the harness out of the truck and trying to figure out the power supply for the computer and integrated with the jeep

You sure are not looking very hard. Your local O'Reilly has or can get either the Haynes or Chilton repair manual and both have decent wiring diagrams.