battery won't charge with efans in path?

Very strange problem. To start with, the primary engine connections are connected to the side post battery w/o the efans and everything works fine. We got connections for the efans that provided a longer side post bolt and the efan connection is now between the battery and main engine connections. With that setup, the battery is not getting charged, but there is sufficient connectivity to start the engine. Is the computer not getting the signal the battery needs charge? Any idea why the alternator wouldn't be charging the battery with the extra connections on the battery?
thanks