Hi There and welcome to Chevy Chatter II.
Yes, your charging system has been modified at one point in time. The correct generator for 1932 is a Delco-Remy Model 943-J. It should have only one wire and that wire goes to the "GEN"
terminal on the cut-out relay that sits on top of the generator. The "BATT" terminal on the other side of the cut-out relay goes to the back of the ammeter. There are no other connections from the generator, and there is no "box" on the firewall.
To further understand how the 1932 charging system is wired you can order a wiring diagram from the Filling Station in Lebanon, Oregon. Go here:
www.fillingstation.com 
:) :grin: