280ZX Power Steering Pump

I'm rebuilding the power steering pump on my '83 280zx and there is a snap ring on the back with no visible way of removing it. I'm hoping someone else has done this before and knows the trick. The front one is a circlip with two holes. That was fairly easy. This back one has straight ends, not beveled and no room behind it to fit any pick tool. It doesn't even slide in the groove. The rebuild kit didn't include one even though the FSM says not to reuse it. Any ideas?