brucehf

I inherited this from a friend who lost the adapter. What is the polarity of the 9v 2000 adapter ? I have multiple adapters but don't want to blow it with the wrong polarity. Can't find it in any specs or user manual. Also it has a 5 pin flat plug exposed outside that is connected inside but unclear what it is used for. Any help ? Thanks, Bruce Floor Pod Motherboard.jfif