You should stop cursing!Update, charging at 13.7v at idle and no more than 14.8v cursing.
The floated ground from the stator, along with the power wire for the lights both feed into the new regulator/rectifier, out of that comes the + and - to the battery, the negative of the battery can then be grounded to the frame to retain all frame grounds.
once your past the reg/rec, the battery circuts should work just like any other battery system on cars or atvs, ground from battery to frame and use frame grounds where needed.
So can you splice it into the yellow one or does it get grounded somewhere else.that appears to be correct above, both yellows of the reg/rec go to the lighting coil
View attachment 27518
as it is now, one wire of the lighting coil is grounded to the stator plate,
you have to "float it" to one of the yellows.
View attachment 27517
LOL.
download the instructions for the trailtechs here:
http://gallery.trailtech.net/media/instructions/lights/regrec/010-ELV-116.pdf