Thanks for looking Robbo.
I looked for a wiring diagram myself but to no avail.
I also looked for a diagram for the optional controller but no luck there either.
Hopefully, someone has a battery pack, charger, controller, etc and can check the output to let me know.
I already have a couple of connections to the battery for heated grips and a CTEK battery conditioner, so wanted to minimise the number of connections by splicing onto the CTEK cable and soldering a universal SAE connector, to which I can plug in an Exo2 conversion cable.
I guess if I don't get any luck regarding finsing out which polarity the connector is, I'll have to bite the bullet and get a dedicated Exo2 battery connector.