Tt600 - Where’s Does This Go ?

I recently changed my TT600 from one frame to another. It’s all MOT’d but it doesn’t run right. It idles badly and stutters when I open the throttle at different points of the rev range. It has error codes which the dealer couldn’t clear but seems to be being triggered around the loom by the clocks. I’ve got a plug left over that is wired directly to the battery by the lights bit not sure if To was even plugged into anything when I started. I’ve attached a pic hope that works.
I also have a spare plug on top of the engine which I’m sure there is no partner for. And there is also a cable that appears to be clipped off which I didn’t do. Again I don’t know if it is needed.
Any help or advice you can give is much appreciated.
Cheers

 

Ah yes, battery charger makes sense. Thanks. I can rule that out. I was putting off cutting up the loom wrapping to see where they all go but think I’ll have to do that.

 

No there is a white plug for the fuel tank that’s ok

 

Thanks I’ll look into that.
I know they can be buggers to run but it ran nice before.

 

Ah right. Thanks.

 

Thanks mate but no. That’s a white male connector goes on there.

 

So the mysterious three cut off yellow wires? The circuit diagram only referd to three yellows going from reg/rectifier to alternator. So I can see that the three yellow wires go to my reg/rec as per the picture below. But you can see that there are also three blue/black wires also going to my reg/rec that are the ones that go to my alternator. So I am confused to say the least. I can see where they go but not what they should attach to, if my alternator is ok ?

 

Just been scouring other forums and this has come up before. Apparently there was a recall as the original alternator wiring was too small gauge. So a stand-alone blue/black harness was fitted. This makes sense as mine is a separate part of the loom. The original one is just snipped off. But don’t know why it’s still plugged in. Probably as it’s still the power and earths connections .