Big Brain Garage '73 duster build

Christmas update!! Worked more on the wiring today and we have headlights, dash lights, and an ignition system!!!! Big accomplishment for me as wiring is not my specialty! Next is charging system and then the bulk of the wiring is done for now! Going through the harness and cutting off anything I’m not going to be using to try and keep it clean, I have no idea what these boxes are for, anyone have a clue? I have the voltage regulator, the electronic ignition box is already removed (not needed with the MSD distributor I got) I don’t know what these are…
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And here’s the bay currently with the bird nest of wires

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