Hello.. Opened up my WD cabinet yesterday to install my ColorDMD (looks awesome btw) and found this on top of the subwoofer in the bottom of the cabinet. Hanging out there, all magnetized like. I tried to look on the bottom of the playfield in that area but there is so much going on. I tried the manual as well, but those pics are so blurry. Any idea where this would have fallen from? It wants to find its home. The top is smooth. Thanks for looking!