I think 1 is the wires for the horn...3 is the wires that go to the rear harness to run the tail lights/turn signals/stop lights in the rear.
The ones in 2 might be for the front lights but i cant tell from the pic...
What do you have on the firewall for the light system...the large distribution box or the small solid state unit....or something else?
Reference:
Large distribution box:
small solid state unit:
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