You guys people were a great help with the distributor question.

Subject vehicle, 1982 Westy 2L aircooled.
I'm rewiring this Westy
There is a black box 4"x6"x1" in the engine compartment driver side a
few inches ahead of the light assembly.
What is it's purpose?
Any relays supposed to be in it?
Photo of box is at link below
http://zzyzx.org/Img_7396_resized.jpg