[Sergio]

The point on that fuse comment is that the OBC white wire is fused and controlled by the Tow/Run switch, so it is the best wire to provide the by-pass lockout signal to the Controller.

The gray "sense" wire should be left disconnected for safety.

If You do connect the gray wire to the pack negative, the old style Power Drive or the DPI BTL charger will run uncontrolled as long as they are plugged to the cart.

The other 10ga black wire "combo crimped" at the Controller B- is to provide a negative to any accessories You wire.

That is only important if You are using the OBC for charging as the system requires the OBC to measure all current going in and out of the batteries.

If a working OBC does not sense the charger plugged to the cart it will put the controller to sleep after 3 days. This is irrelevant if the OBC lockout signal is by-passed.

The dash light has both a visible light to indicate charging problems as well as an infrared light that transmits charging data.

Here is a trick for checking TV/etc infrared remotes or if You want to see that dash light infrared light operate, just use you phone's camera as it picks up infrared really well.

If You point your phone's camera to the dash light in a darker environment, You will see the infrared LED blinking from the right side of the dash light.