Just fitted mine on a T6 and took ages to identify the wire colour combinations in poor lighting with bad eyesight.....eventually did it by process of elimination... and it works!
I’m no expert but I think I may have spotted an error in the PF Jones Fitting Instructions for anyone with a Smart Alternator. It shows the towing loom earth connection direct to the battery terminal, bypassing the sensor on the battery earth lead. Shouldn’t the wiring be earthed on the chassis somewhere before the sensor so the computer can see the current drawn, or is it so small it doesn’t matter? I’ve asked the supplier, but not heard back yet.