Electrical 1987 5.0l Wiring Question

Cody D said:

Hello, I've been trying to complete the wiring for a 302 swap that I've been working on and it hasn't been going well.

I have the wiring diagram and the ECU pinout diagram but I still am confused as to the purpose and need for a couple plugs in the engine bay.

There are two 8 pin plugs that have wires going into them from various parts of the car. Can someone explain to me the purpose of these plugs?

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