Looks like "E" side is hot side. That would be the same as your pic I believe. Can't you follow the wires that are on the gauge in the picture? Don't use color red for any wire that is not hot. EVER.
The wires are not attached to gauge any different for pos ground than for neg ground.


Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn