If the truck is the same as the car I can provide pics of the junction block inside the engine compartment of a '38. IF your question is which wires on the headlight pigtail connect to which terminal of the junction block, it really make no difference. From the factory the low beam connects to the center terminal. The high beam and park light connect to the other two whichever way you want.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.