You could try figuring it out from the pinout.
I used to know a lot about the ins and outs of floppy drive configuration from messing with various systems that actually needed the drive ID and motor select etc set properly, but nothing much is coming back to me.
Also might be worth looking at the JU257 drive conversion file on aminet for clues. If you give up on that one, the JU257s are very common and reliable, though like it sounds on that one, the newer ones don't have the jumper blocks, you have to mess with shunts soldered to the board.
