That's correct. There are two circuit boards in the Schumacher battery chargers - the ones you see in this picture, and smaller ones that contain the controls to adjust voltage and current. The only change we had to make was to extend the 5-pin ribbon cable between them so it can run from the back through to the front (as seen in this picture:
http://www.chiefdelphi.com/forums/sh...hreadid=86130).