Color or B&W, it makes no difference. All monitors need to be discharged and they discharge the same way.
The inputs on the main connector on a B&W monitor are shown in the manuals you can download at mikesarcade.com but typically are 120 volt ac power, frame ground, signal ground, signal (consisting of composite video and sync on the same pin), and if fitted there is a +5 volt power supply/speaker amplifier board that also uses the main connector.
BTW, you can feed the video out from a VCR, video camera, DVD player, etc to the video input of a B&W arcade monitor.