[slob]

I assume (without going back through quite a long thread) by ‘muv2’ you mean M-Unit V.2?
All circuits not listed eg Neutral, Oil, heated grips, GPS etc etc, need to go on the ‘Aux’ output (8)
Check page 11 in the manual.

for the reg/rec: Red goes to the battery via main 30A fuse, Earth to Earth (duh)
Leaving you: Red/Black and Red/White which still go to their original locations too.
R/W goes to the charge light, which is then connected to an idiot light common positive connection (oil and stand?) which I guess also needs to go via Aux-Pin8 on the M-Unit, as it's an additional load, and will cause the light to come on if there's a voltage difference between battery and reg/rec output.
R/Bk goes to the fuse box (fuse B) which connects to the main relay, and kill switch, which just shorts the LT side of the ignition system to Earth to kill it.