Few Q's about a PET & Expandapet

I have been playing around with the PET and the Expandapet card I aquired recently. As there was no documentation with the expandapet, I connected the floppy cable to the drive and powered first the machine up, and then the drive. Floppy lights come on, but the motor does not spin, even for a short moment. When I repeat it, but this time reversing the flatcable connector, the motors do spin constantly. In both cases, the system reports 8K memory, and the sys(45056) command freezes the machine completely, only a reset helps. Oh, the powercable is connected.... On the expandapet board, there are 4 card slots, the last slot (back of the machine, has the floppy controller, and the slot before that has the little card with 2 eproms. The remaining 2 slots are empty. Quetions which comes to mind are - does the machine report 32K i.s.o 8k when the board is mounted and connected, or does it always need the SYS command to detect the extra memory? - Anyone have the schematics? Thanks, Ed