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: