Reg Rec conversion

Hi guys ,this my first post so I,ll crack on .
all my bikes over the years have been KZ Kawasaki  s of various sizes from 305LTD to KZ 1200 Voyager ,
but now as I get older, I need smaller so I have B1 750 twin I have fitted it with a combined regrec unit, connected the wires as told 
but there are 2 wires left coming from the alternator ,brown and a green shieved in cloth 
any body help me out please

Ted

Welcome from the UK

incorrect info. deleted. for different charging system. thanks for the correction.

According to the below B1 diagram this bike has a "field coil" charging system. That being the case the brown is ignition live and the green is the control wire that should go to the reg/rec. Previous comment relates to "permanent magnet" charging systems 

What or who provided the new reg/rec combo unit? How many wires does it have. As Wookie indicated the stock system on a 750 B1 is an excited field system and not a permenet magnet system. I am not sure where in the world you are located or where the bike was intended to be sold stock. So I have attached both wiring diagrams for a US and European version.