Great question! I need to know the same thing. Also what type of power supply? Thank You!:-)

Appears to be a coaxial power plug. If you have a bunch of wall warts check a few to get the size. They vary by OD and ID. Two wire, then just hook up to a transformer or DC power pack depending of if yours is two rail or three rail.

Pete

Norton, thank you for your information

Winton, I ordered from Amazon what I believe may be the correct connector with leads, I should have it in a few days. I will let you know if it is the correct one.