ahh...looks like it can be a DC attachment.
http://societyfound.com/2014/03/24/s...-ghost-arcade/
Arcade not too far from my house....(Noiseredux OR anyone into arcade games, if yer ever near/in Chicago, you'd definitely want to check this joint out) It's really like an arcade museum. So many games....and all for free. Hopefully we get some OG meetups in the summer there.