The HD unit is a direct replacement for the CE original Nippymog. The only thing that needs to be changed is the ring tag on the end of the long lead that goes up to the terminal block near the battery, it needs a larger ring. The only other plug is a square 4 pin AMP type plug about 6" down the loom from the rectifier. Check it is fully connected and locked when you connect the plugs, it can be stiff to engage fully. Use cable ties on the loom to stop any chaffing. Check you have about 14.5v when the engine is running.
Let me understand this correctly, when using the HD rectifier the connector is a straight sway, just plug it in securely.
There are two other wires coming out of the rectifier. One with a red lug on the end and the other with a black lug on the end.
Is the black one to go to the negative of the battery or the nearest ground?
Where is the red, which I assume is positive, supposed to go? To the red lug in front of the lil tank? Is that the wire that disappears into the loom in that wire mess by the oil filter?