Got clarity that it was bad translation. They're cancelling my order because the text does indeed refer to the standlight on the rear being supplied by the front (electrically).
Well in the end it is already dispatched, so will probably wait and return it.
I like the lights a lot, but given I want to mount it to the front fender on my ISEN using @coldharbour's adaptor, I think it will be too heavy. Think I'll end up getting Edelux lights instead.
Too good to be true...
Got clarity that it was bad translation. They're cancelling my order because the text does indeed refer to the standlight on the rear being supplied by the front (electrically).