It is called a bypass capacitor, hence the B label on the silk screen.
The value varies but typically they are .01 µd.
They are between 5V and ground so you do not want to jumper across those holes.
—
Chris Hibler - CARGPB #31
Http://chrishiblerpinball.com/contact
http://www.PinWiki.com/ - The new place for pinball repair info