Ok the lines coming from the pcb are most likely logic lines... they won't be over 5v which isn't nearly enough to power a rumble motor. The board you have pictured is most likely an amp board, which would require the original game's power supply and you drive the logic pins on the board with the pac drive.
Get out a multi-meter and be sure..... if you have 12-30v flowing through your pac drive you are going to fry it and most likely your pc's usb port as well.