I could not find the plugs you showed in your photos, but then it occurred to me like a thunderbolt! There is a wire in the dining room of my apt. that comes in through the wall! I unplugged that and the Verizon unit beeped! Then I disconnected the battery (again) and all the lights went off, power is disabled to the unit!
Thanks so much for your patience with me, and for helping me find the solution to my problem!
Beth