!!!!The controller does not have 12 volts!!!.
You need to buy and use a 48V - 96V to 12V converter,
Like the one from the link
https://www.ebay.de/itm/DC-48V-96V-...a=0&pg=2047675&_trksid=p2047675.c100012.m1985
You need to buy and use a 48V - 96V to 12V converter,
Like the one from the link
https://www.ebay.de/itm/DC-48V-96V-...a=0&pg=2047675&_trksid=p2047675.c100012.m1985