According to the provided information, the location of the Brose Motor serial number is on the bottom of the bike, protected by a motor cover that would need to be taken off to find the serial number.
Maybe I should explain my request a little better. I have a motor (without a bike) and I know the serial number. I'm looking to find out what motor I have, what the specs are, and what bike(s) it can be installed into. It is not compatible with the motor I'm replacing and I can't return it. Just looking to resell but want to know how to list it.