Terminal blocks photos
J-box, and terminal block photos, and drawings, and theorys
Small J-box
found on jeeps, weasels, and certain applications of other vehicles.
Medium J-box
from M4A3 sherman main distribution boxes, note 14 pin blocks.
Large J-box
found on Dodges, (command car & Carryall) and halftracks, most likely for SCR-193 application