Greg,
On the Pz II-C the wiring is pretty straightforward. See line diagram below from Achtung Panzer #7 which is posted for discussion purposes only. A conduit runs into the hull right next to the fender and allows separate wiring to go to the horn, Notek light, and regular headlight on the left hand side. On the right, it's the same conduit but with only the one wire for the regular headlight. Hope this helps!